188402590028 has 12 divisors (see below), whose sum is σ = 329707728840. Its totient is φ = 94200381792.

The previous prime is 188402590007. The next prime is 188402590087. The reversal of 188402590028 is 820095204881.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480143 + ... + 779321.

It is an arithmetic number, because the mean of its divisors is an integer number (27475644070).

Almost surely, 2^188402590028 is an apocalyptic number.

It is an amenable number.

188402590028 is a deficient number, since it is larger than the sum of its proper divisors (141305138812).

188402590028 is a wasteful number, since it uses less digits than its factorization.

188402590028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456616 (or 456614 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 188402590028 in words is "one hundred eighty-eight billion, four hundred two million, five hundred ninety thousand, twenty-eight".