188664612 has 48 divisors (see below), whose sum is σ = 449137920. Its totient is φ = 61627392.

The previous prime is 188664571. The next prime is 188664613. The reversal of 188664612 is 216466881.

It is a super-2 number, since 2×188664612² = 71188671642221088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (188664613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126133 + ... + 127619.

It is an arithmetic number, because the mean of its divisors is an integer number (9357040).

Almost surely, 2^188664612 is an apocalyptic number.

188664612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188664612 is an abundant number, since it is smaller than the sum of its proper divisors (260473308).

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

188664612 is a wasteful number, since it uses less digits than its factorization.

188664612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1698 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 188664612 is about 13735.5237249986. The cubic root of 188664612 is about 573.5396966107.

The spelling of 188664612 in words is "one hundred eighty-eight million, six hundred sixty-four thousand, six hundred twelve".