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1230440454 = 232389175727
BaseRepresentation
bin100100101010111…
…0000100000000110
310011202021211222200
41021111300200012
510004443043304
6322032335330
742330366645
oct11125604006
93152254880
101230440454
11581608141
122a40a4546
13167bc1a99
14b95b535c
157304ee39
hex49570806

1230440454 has 24 divisors (see below), whose sum is σ = 2672822880. Its totient is φ = 409090128.

The previous prime is 1230440411. The next prime is 1230440459. The reversal of 1230440454 is 4540440321.

It is a happy number.

It is a super-2 number, since 2×12304404542 = 3027967421679452232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230440459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80862 + ... + 94865.

It is an arithmetic number, because the mean of its divisors is an integer number (111367620).

Almost surely, 21230440454 is an apocalyptic number.

1230440454 is an abundant number, since it is smaller than the sum of its proper divisors (1442382426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1230440454 is a wasteful number, since it uses less digits than its factorization.

1230440454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176124 (or 176121 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1230440454 is about 35077.6346694015. The cubic root of 1230440454 is about 1071.5691461877.

Adding to 1230440454 its reverse (4540440321), we get a palindrome (5770880775).

The spelling of 1230440454 in words is "one billion, two hundred thirty million, four hundred forty thousand, four hundred fifty-four".

Divisors: 1 2 3 6 9 18 389 778 1167 2334 3501 7002 175727 351454 527181 1054362 1581543 3163086 68357803 136715606 205073409 410146818 615220227 1230440454