188909136 has 60 divisors (see below), whose sum is σ = 569356788. Its totient is φ = 58125312.

The previous prime is 188909111. The next prime is 188909141. The reversal of 188909136 is 631909881.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 179024400 = 3144^2 + 13380^2 .

It is a junction number, because it is equal to n+sod(n) for n = 188909091 and 188909100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48585 + ... + 52328.

Almost surely, 2^188909136 is an apocalyptic number.

188909136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

188909136 is an abundant number, since it is smaller than the sum of its proper divisors (380447652).

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

188909136 is a wasteful number, since it uses less digits than its factorization.

188909136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100940 (or 100931 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 188909136 is about 13744.4219958498. The cubic root of 188909136 is about 573.7873736459.

The spelling of 188909136 in words is "one hundred eighty-eight million, nine hundred nine thousand, one hundred thirty-six".