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1289884904361 = 32347210912
BaseRepresentation
bin10010110001010011001…
…000011010101110101001
311120022102022000100120100
4102301103020122232221
5132113141013414421
62424322010020013
7162122356532544
oct22612310325651
94508368010510
101289884904361
11458045446119
12189ba3a17609
139483560c451
144660602585b
1523845dcec26
hex12c5321aba9

1289884904361 has 27 divisors (see below), whose sum is σ = 1870266181693. Its totient is φ = 856659178680.

The previous prime is 1289884904359. The next prime is 1289884904377. The reversal of 1289884904361 is 1634094889821.

The square root of 1289884904361 is 1135731.

It is a perfect power (a square), and thus also a powerful number.

1289884904361 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 88 + 490 + 4 + 3 + 61 = 666.

It is not a de Polignac number, because 1289884904361 - 21 = 1289884904359 is a prime.

It is a super-2 number, since 2×12898849043612 (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289884904311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1182295426 + ... + 1182296516.

Almost surely, 21289884904361 is an apocalyptic number.

1289884904361 is the 1135731-st square number.

1289884904361 is the 567866-th centered octagonal number.

It is an amenable number.

1289884904361 is a deficient number, since it is larger than the sum of its proper divisors (580381277332).

1289884904361 is an frugal number, since it uses more digits than its factorization.

1289884904361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 1289884904361 in words is "one trillion, two hundred eighty-nine billion, eight hundred eighty-four million, nine hundred four thousand, three hundred sixty-one".

Divisors: 1 3 9 347 1041 1091 3123 3273 9819 120409 361227 378577 1083681 1135731 1190281 3407193 3570843 10712529 131366219 394098657 413027507 1182295971 1239082521 3717247563 143320544929 429961634787 1289884904361