115661404 has 24 divisors (see below), whose sum is σ = 214921728. Its totient is φ = 54274560.

The previous prime is 115661401. The next prime is 115661431. The reversal of 115661404 is 404166511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115661401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23824 + ... + 28264.

It is an arithmetic number, because the mean of its divisors is an integer number (8955072).

Almost surely, 2^115661404 is an apocalyptic number.

It is an amenable number.

115661404 is a deficient number, since it is larger than the sum of its proper divisors (99260324).

115661404 is a wasteful number, since it uses less digits than its factorization.

115661404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845 (or 4843 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 115661404 is about 10754.5992022018. The cubic root of 115661404 is about 487.2249128719.

The spelling of 115661404 in words is "one hundred fifteen million, six hundred sixty-one thousand, four hundred four".