115661406 has 32 divisors (see below), whose sum is σ = 264741120. Its totient is φ = 32999616.

The previous prime is 115661401. The next prime is 115661431. The reversal of 115661406 is 604166511.

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 15 ways as a sum of consecutive naturals, for example, 37885 + ... + 40823.

It is an arithmetic number, because the mean of its divisors is an integer number (8273160).

Almost surely, 2^115661406 is an apocalyptic number.

115661406 is an abundant number, since it is smaller than the sum of its proper divisors (149079714).

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

115661406 is a wasteful number, since it uses less digits than its factorization.

115661406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 115661406 is about 10754.5992951853. The cubic root of 115661406 is about 487.2249156803.

The spelling of 115661406 in words is "one hundred fifteen million, six hundred sixty-one thousand, four hundred six".