188157490 has 16 divisors (see below), whose sum is σ = 344424960. Its totient is φ = 73987120.

The previous prime is 188157443. The next prime is 188157493. The reversal of 188157490 is 94751881.

It is a happy number.

188157490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (188157493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158866 + ... + 160045.

It is an arithmetic number, because the mean of its divisors is an integer number (21526560).

Almost surely, 2^188157490 is an apocalyptic number.

188157490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188157490 is a deficient number, since it is larger than the sum of its proper divisors (156267470).

188157490 is a wasteful number, since it uses less digits than its factorization.

188157490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318977.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 188157490 is about 13717.0510679227. The cubic root of 188157490 is about 573.0253525124.

The spelling of 188157490 in words is "one hundred eighty-eight million, one hundred fifty-seven thousand, four hundred ninety".