1368431544 has 32 divisors (see below), whose sum is σ = 3477165840. Its totient is φ = 448665600.

The previous prime is 1368431513. The next prime is 1368431549. The reversal of 1368431544 is 4451348631.

It is a happy number.

It is a super-2 number, since 2×1368431544² = 3745209781228447872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368431549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465897 + ... + 468824.

Almost surely, 2^1368431544 is an apocalyptic number.

It is an amenable number.

1368431544 is an abundant number, since it is smaller than the sum of its proper divisors (2108734296).

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

1368431544 is a wasteful number, since it uses less digits than its factorization.

1368431544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934791 (or 934787 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 1368431544 is about 36992.3173645556. The cubic root of 1368431544 is about 1110.2165375784.

The spelling of 1368431544 in words is "one billion, three hundred sixty-eight million, four hundred thirty-one thousand, five hundred forty-four".