115061640 has 128 divisors (see below), whose sum is σ = 368271360. Its totient is φ = 28692224.

The previous prime is 115061633. The next prime is 115061641. The reversal of 115061640 is 46160511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 115061640.

It is not an unprimeable number, because it can be changed into a prime (115061641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129277 + ... + 130163.

It is an arithmetic number, because the mean of its divisors is an integer number (2877120).

Almost surely, 2^115061640 is an apocalyptic number.

115061640 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 115061640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184135680).

115061640 is an abundant number, since it is smaller than the sum of its proper divisors (253209720).

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

115061640 is a wasteful number, since it uses less digits than its factorization.

115061640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 115061640 is about 10726.6788895725. The cubic root of 115061640 is about 486.3812821925.

The spelling of 115061640 in words is "one hundred fifteen million, sixty-one thousand, six hundred forty".