115400440 has 32 divisors (see below), whose sum is σ = 260750160. Its totient is φ = 45964800.

The previous prime is 115400431. The next prime is 115400497. The reversal of 115400440 is 44004511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3655 + ... + 15625.

Almost surely, 2^115400440 is an apocalyptic number.

115400440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115400440 is an abundant number, since it is smaller than the sum of its proper divisors (145349720).

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

115400440 is a wasteful number, since it uses less digits than its factorization.

115400440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223 (or 12219 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 115400440 is about 10742.4596810972. The cubic root of 115400440 is about 486.8581990420.

Adding to 115400440 its reverse (44004511), we get a palindrome (159404951).

The spelling of 115400440 in words is "one hundred fifteen million, four hundred thousand, four hundred forty".