115342640 has 80 divisors (see below), whose sum is σ = 311765760. Its totient is φ = 38864640.

The previous prime is 115342639. The next prime is 115342649. The reversal of 115342640 is 46243511.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (115342649) 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, 31295 + ... + 34785.

It is an arithmetic number, because the mean of its divisors is an integer number (3897072).

Almost surely, 2^115342640 is an apocalyptic number.

115342640 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 115342640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155882880).

115342640 is an abundant number, since it is smaller than the sum of its proper divisors (196423120).

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

115342640 is a wasteful number, since it uses less digits than its factorization.

115342640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570 (or 3564 counting only the distinct ones).

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

The square root of 115342640 is about 10739.7690850409. The cubic root of 115342640 is about 486.7769021151.

The spelling of 115342640 in words is "one hundred fifteen million, three hundred forty-two thousand, six hundred forty".