115220400 has 60 divisors (see below), whose sum is σ = 369093192. Its totient is φ = 30725120.

The previous prime is 115220341. The next prime is 115220401. The reversal of 115220400 is 4022511.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 115220400.

It is not an unprimeable number, because it can be changed into a prime (115220401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46809 + ... + 49208.

Almost surely, 2^115220400 is an apocalyptic number.

115220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115220400 is an abundant number, since it is smaller than the sum of its proper divisors (253872792).

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

115220400 is a wasteful number, since it uses less digits than its factorization.

115220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96038 (or 96027 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 115220400 is about 10734.0765788213. The cubic root of 115220400 is about 486.6048794601.

Adding to 115220400 its reverse (4022511), we get a palindrome (119242911).

The spelling of 115220400 in words is "one hundred fifteen million, two hundred twenty thousand, four hundred".