188917650 has 48 divisors (see below), whose sum is σ = 520576800. Its totient is φ = 50377680.

The previous prime is 188917643. The next prime is 188917667. The reversal of 188917650 is 56719881.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 188917596 and 188917605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68620 + ... + 71319.

It is an arithmetic number, because the mean of its divisors is an integer number (10845350).

Almost surely, 2^188917650 is an apocalyptic number.

188917650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188917650 is an abundant number, since it is smaller than the sum of its proper divisors (331659150).

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

188917650 is a wasteful number, since it uses less digits than its factorization.

188917650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139960 (or 139949 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 188917650 is about 13744.7317180074. The cubic root of 188917650 is about 573.7959935789.

The spelling of 188917650 in words is "one hundred eighty-eight million, nine hundred seventeen thousand, six hundred fifty".