188972090 has 32 divisors (see below), whose sum is σ = 344450880. Its totient is φ = 74640384.

The previous prime is 188972089. The next prime is 188972099. The reversal of 188972090 is 90279881.

It is not an unprimeable number, because it can be changed into a prime (188972099) 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, 345197 + ... + 345743.

It is an arithmetic number, because the mean of its divisors is an integer number (10764090).

Almost surely, 2^188972090 is an apocalyptic number.

188972090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188972090 is a deficient number, since it is larger than the sum of its proper divisors (155478790).

188972090 is a wasteful number, since it uses less digits than its factorization.

188972090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 188972090 is about 13746.7119705041. The cubic root of 188972090 is about 573.8511048118.

The spelling of 188972090 in words is "one hundred eighty-eight million, nine hundred seventy-two thousand, ninety".