118009881 has 48 divisors (see below), whose sum is σ = 191572992. Its totient is φ = 69400800.

The previous prime is 118009873. The next prime is 118009891. The reversal of 118009881 is 188900811.

It is not a de Polignac number, because 118009881 - 2³ = 118009873 is a prime.

It is a super-2 number, since 2×118009881² = 27852664027268322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118009811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 723906 + ... + 724068.

It is an arithmetic number, because the mean of its divisors is an integer number (3991104).

Almost surely, 2^118009881 is an apocalyptic number.

118009881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118009881 is a deficient number, since it is larger than the sum of its proper divisors (73563111).

118009881 is a wasteful number, since it uses less digits than its factorization.

118009881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 118009881 is about 10863.2352915695. The cubic root of 118009881 is about 490.5005034488.

The spelling of 118009881 in words is "one hundred eighteen million, nine thousand, eight hundred eighty-one".