115863690 has 32 divisors (see below), whose sum is σ = 279527616. Its totient is φ = 30735360.

The previous prime is 115863689. The next prime is 115863697. The reversal of 115863690 is 96368511.

It is a super-2 number, since 2×115863690² = 26848789320832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115863697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4216 + ... + 15795.

It is an arithmetic number, because the mean of its divisors is an integer number (8735238).

Almost surely, 2^115863690 is an apocalyptic number.

115863690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115863690 is an abundant number, since it is smaller than the sum of its proper divisors (163663926).

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

115863690 is a wasteful number, since it uses less digits than its factorization.

115863690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20214.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 115863690 is about 10763.9997212932. Note that the first 3 decimals coincide. The cubic root of 115863690 is about 487.5087914259.

The spelling of 115863690 in words is "one hundred fifteen million, eight hundred sixty-three thousand, six hundred ninety".