188664970 has 32 divisors (see below), whose sum is σ = 369366480. Its totient is φ = 68966400.

The previous prime is 188664967. The next prime is 188665007. The reversal of 188664970 is 79466881.

It can be written as a sum of positive squares in 8 ways, for example, as 109223401 + 79441569 = 10451^2 + 8913^2 .

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, 5946 + ... + 20314.

Almost surely, 2^188664970 is an apocalyptic number.

188664970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188664970 is a deficient number, since it is larger than the sum of its proper divisors (180701510).

188664970 is a wasteful number, since it uses less digits than its factorization.

188664970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 188664970 is about 13735.5367568945. The cubic root of 188664970 is about 573.5400593834.

The spelling of 188664970 in words is "one hundred eighty-eight million, six hundred sixty-four thousand, nine hundred seventy".