115540400 has 30 divisors (see below), whose sum is σ = 277586772. Its totient is φ = 46216000.

The previous prime is 115540393. The next prime is 115540427. The reversal of 115540400 is 4045511.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 5 ways as a sum of consecutive naturals, for example, 144026 + ... + 144825.

Almost surely, 2^115540400 is an apocalyptic number.

115540400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115540400 is an abundant number, since it is smaller than the sum of its proper divisors (162046372).

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

115540400 is a wasteful number, since it uses less digits than its factorization.

115540400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288869 (or 288858 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 115540400 is about 10748.9720438747. The cubic root of 115540400 is about 487.0549433659.

Adding to 115540400 its reverse (4045511), we get a palindrome (119585911).

The spelling of 115540400 in words is "one hundred fifteen million, five hundred forty thousand, four hundred".