1155045438 has 12 divisors (see below), whose sum is σ = 2502598488. Its totient is φ = 385015140.

The previous prime is 1155045401. The next prime is 1155045443. The reversal of 1155045438 is 8345405511.

1155045438 is a `hidden beast` number, since 115 + 504 + 5 + 4 + 38 = 666.

It is a super-2 number, since 2×1155045438² = 2668259927689223688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32084578 + ... + 32084613.

It is an arithmetic number, because the mean of its divisors is an integer number (208549874).

Almost surely, 2^1155045438 is an apocalyptic number.

1155045438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1155045438 is an abundant number, since it is smaller than the sum of its proper divisors (1347553050).

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

1155045438 is a wasteful number, since it uses less digits than its factorization.

1155045438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64169199 (or 64169196 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 1155045438 is about 33985.9594244447. The cubic root of 1155045438 is about 1049.2195070574.

The spelling of 1155045438 in words is "one billion, one hundred fifty-five million, forty-five thousand, four hundred thirty-eight".