1157918172 has 24 divisors (see below), whose sum is σ = 2728043136. Its totient is φ = 382225008.

The previous prime is 1157918171. The next prime is 1157918173. The reversal of 1157918172 is 2718197511.

It is an interprime number because it is at equal distance from previous prime (1157918171) and next prime (1157918173).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157918171) 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, 467178 + ... + 469649.

It is an arithmetic number, because the mean of its divisors is an integer number (113668464).

Almost surely, 2^1157918172 is an apocalyptic number.

1157918172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1157918172 is an abundant number, since it is smaller than the sum of its proper divisors (1570124964).

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

1157918172 is a wasteful number, since it uses less digits than its factorization.

1157918172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936937 (or 936935 counting only the distinct ones).

The product of its digits is 35280, while the sum is 42.

The square root of 1157918172 is about 34028.1967197793. The cubic root of 1157918172 is about 1050.0886310671.

The spelling of 1157918172 in words is "one billion, one hundred fifty-seven million, nine hundred eighteen thousand, one hundred seventy-two".