115721408 has 28 divisors (see below), whose sum is σ = 250512072. Its totient is φ = 52600320.

The previous prime is 115721407. The next prime is 115721423. The reversal of 115721408 is 804127511.

It is not an unprimeable number, because it can be changed into a prime (115721401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81485 + ... + 82892.

Almost surely, 2^115721408 is an apocalyptic number.

It is an amenable number.

115721408 is an abundant number, since it is smaller than the sum of its proper divisors (134790664).

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

115721408 is a wasteful number, since it uses less digits than its factorization.

115721408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164400 (or 164390 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 115721408 is about 10757.3885306797. The cubic root of 115721408 is about 487.3091541383.

Adding to 115721408 its reverse (804127511), we get a palindrome (919848919).

The spelling of 115721408 in words is "one hundred fifteen million, seven hundred twenty-one thousand, four hundred eight".