115432640 has 56 divisors (see below), whose sum is σ = 281299920. Its totient is φ = 45093888.

The previous prime is 115432631. The next prime is 115432643. The reversal of 115432640 is 46234511.

It is not an unprimeable number, because it can be changed into a prime (115432643) 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, 9566 + ... + 17954.

Almost surely, 2^115432640 is an apocalyptic number.

115432640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140649960).

115432640 is an abundant number, since it is smaller than the sum of its proper divisors (165867280).

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

115432640 is an equidigital number, since it uses as much as digits as its factorization.

115432640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8449 (or 8439 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 115432640 is about 10743.9583022273. The cubic root of 115432640 is about 486.9034772522.

The spelling of 115432640 in words is "one hundred fifteen million, four hundred thirty-two thousand, six hundred forty".