115769640 has 128 divisors (see below), whose sum is σ = 399144960. Its totient is φ = 26313984.

The previous prime is 115769629. The next prime is 115769683. The reversal of 115769640 is 46967511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237477 + ... + 237963.

It is an arithmetic number, because the mean of its divisors is an integer number (3118320).

Almost surely, 2^115769640 is an apocalyptic number.

115769640 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 115769640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199572480).

115769640 is an abundant number, since it is smaller than the sum of its proper divisors (283375320).

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

115769640 is a wasteful number, since it uses less digits than its factorization.

115769640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 115769640 is about 10759.6301051663. The cubic root of 115769640 is about 487.3768472611.

The spelling of 115769640 in words is "one hundred fifteen million, seven hundred sixty-nine thousand, six hundred forty".