115071640 has 64 divisors (see below), whose sum is σ = 275853600. Its totient is φ = 43051008.

The previous prime is 115071631. The next prime is 115071647. The reversal of 115071640 is 46170511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115071647) 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, 133531 + ... + 134389.

Almost surely, 2^115071640 is an apocalyptic number.

115071640 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 115071640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137926800).

115071640 is an abundant number, since it is smaller than the sum of its proper divisors (160781960).

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

115071640 is a wasteful number, since it uses less digits than its factorization.

115071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 115071640 is about 10727.1450069438. The cubic root of 115071640 is about 486.3953722400.

The spelling of 115071640 in words is "one hundred fifteen million, seventy-one thousand, six hundred forty".