188900646 has 16 divisors (see below), whose sum is σ = 412147008. Its totient is φ = 57242600.

The previous prime is 188900629. The next prime is 188900659. The reversal of 188900646 is 646009881.

It is a junction number, because it is equal to n+sod(n) for n = 188900598 and 188900607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431000 + ... + 1431131.

It is an arithmetic number, because the mean of its divisors is an integer number (25759188).

Almost surely, 2^188900646 is an apocalyptic number.

188900646 is an abundant number, since it is smaller than the sum of its proper divisors (223246362).

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

188900646 is a wasteful number, since it uses less digits than its factorization.

188900646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862147.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 188900646 is about 13744.1131398137. The cubic root of 188900646 is about 573.7787777535.

The spelling of 188900646 in words is "one hundred eighty-eight million, nine hundred thousand, six hundred forty-six".