188123490 has 48 divisors (see below), whose sum is σ = 495331200. Its totient is φ = 49529376.

The previous prime is 188123489. The next prime is 188123527. The reversal of 188123490 is 94321881.

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, 6120 + ... + 20339.

It is an arithmetic number, because the mean of its divisors is an integer number (10319400).

Almost surely, 2^188123490 is an apocalyptic number.

188123490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188123490 is an abundant number, since it is smaller than the sum of its proper divisors (307207710).

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

188123490 is a wasteful number, since it uses less digits than its factorization.

188123490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26551 (or 26548 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 188123490 is about 13715.8116784972. The cubic root of 188123490 is about 572.9908352655.

The spelling of 188123490 in words is "one hundred eighty-eight million, one hundred twenty-three thousand, four hundred ninety".