115643820 has 24 divisors (see below), whose sum is σ = 323802864. Its totient is φ = 30838336.

The previous prime is 115643807. The next prime is 115643831. The reversal of 115643820 is 28346511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963639 + ... + 963758.

It is an arithmetic number, because the mean of its divisors is an integer number (13491786).

Almost surely, 2^115643820 is an apocalyptic number.

115643820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115643820 is an abundant number, since it is smaller than the sum of its proper divisors (208159044).

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

115643820 is a wasteful number, since it uses less digits than its factorization.

115643820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927409 (or 1927407 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 115643820 is about 10753.7816604207. The cubic root of 115643820 is about 487.2002206906.

The spelling of 115643820 in words is "one hundred fifteen million, six hundred forty-three thousand, eight hundred twenty".