115623640 has 32 divisors (see below), whose sum is σ = 283804560. Its totient is φ = 42044800.

The previous prime is 115623623. The next prime is 115623671. The reversal of 115623640 is 46326511.

It is a super-2 number, since 2×115623640² = 26737652253699200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115623599 and 115623608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130951 + ... + 131830.

Almost surely, 2^115623640 is an apocalyptic number.

115623640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115623640 is an abundant number, since it is smaller than the sum of its proper divisors (168180920).

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

115623640 is a wasteful number, since it uses less digits than its factorization.

115623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262803 (or 262799 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 115623640 is about 10752.8433449018. The cubic root of 115623640 is about 487.1718800138.

The spelling of 115623640 in words is "one hundred fifteen million, six hundred twenty-three thousand, six hundred forty".