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28994375380607 = 731343151219511
BaseRepresentation
bin1101001011110110001110…
…11100011110111001111111
310210122211112212120001201022
412211323013130132321333
512300020440044134412
6141355455425334355
76051526436225000
oct645730734367177
9123584485501638
1028994375380607
11926949a02538a
1233033797973bb
131324208aa9370
14723499d2b1a7
15354324878a72
hex1a5ec771ee7f

28994375380607 has 32 divisors (see below), whose sum is σ = 37260487756800. Its totient is φ = 22407102113760.

The previous prime is 28994375380601. The next prime is 28994375380681. The reversal of 28994375380607 is 70608357349982.

It is a happy number.

It is not a de Polignac number, because 28994375380607 - 214 = 28994375364223 is a prime.

It is a super-2 number, since 2×289943753806072 (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28994375380601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75418019 + ... + 75801492.

It is an arithmetic number, because the mean of its divisors is an integer number (1164390242400).

Almost surely, 228994375380607 is an apocalyptic number.

28994375380607 is a deficient number, since it is larger than the sum of its proper divisors (8266112376193).

28994375380607 is a wasteful number, since it uses less digits than its factorization.

28994375380607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151219588 (or 151219574 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 71.

The spelling of 28994375380607 in words is "twenty-eight trillion, nine hundred ninety-four billion, three hundred seventy-five million, three hundred eighty thousand, six hundred seven".

Divisors: 1 7 13 43 49 91 301 343 559 637 2107 3913 4459 14749 27391 191737 151219511 1058536577 1965853643 6502438973 7409756039 13760975501 45517072811 51868292273 84531706649 96326828507 318619509677 591721946543 674287799549 2230336567739 4142053625801 28994375380607