115278732 has 18 divisors (see below), whose sum is σ = 291399108. Its totient is φ = 38426232.

The previous prime is 115278731. The next prime is 115278781. The reversal of 115278732 is 237872511.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3202187 = 115278732 / (1 + 1 + 5 + 2 + 7 + 8 + 7 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (115278731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1601058 + ... + 1601129.

Almost surely, 2^115278732 is an apocalyptic number.

115278732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115278732 is an abundant number, since it is smaller than the sum of its proper divisors (176120376).

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

115278732 is a wasteful number, since it uses less digits than its factorization.

115278732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202197 (or 3202192 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 115278732 is about 10736.7933760504. The cubic root of 115278732 is about 486.6869825342.

The spelling of 115278732 in words is "one hundred fifteen million, two hundred seventy-eight thousand, seven hundred thirty-two".