118161870 has 32 divisors (see below), whose sum is σ = 287826048. Its totient is φ = 31039008.

The previous prime is 118161859. The next prime is 118161881. The reversal of 118161870 is 78161811.

It is an interprime number because it is at equal distance from previous prime (118161859) and next prime (118161881).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27384 + ... + 31403.

It is an arithmetic number, because the mean of its divisors is an integer number (8994564).

Almost surely, 2^118161870 is an apocalyptic number.

118161870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118161870 is an abundant number, since it is smaller than the sum of its proper divisors (169664178).

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

118161870 is a wasteful number, since it uses less digits than its factorization.

118161870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58864.

The product of its (nonzero) digits is 2688, while the sum is 33.

The square root of 118161870 is about 10870.2286084516. The cubic root of 118161870 is about 490.7109906210.

The spelling of 118161870 in words is "one hundred eighteen million, one hundred sixty-one thousand, eight hundred seventy".