188400764 has 24 divisors (see below), whose sum is σ = 341311488. Its totient is φ = 90900720.

The previous prime is 188400763. The next prime is 188400799. The reversal of 188400764 is 467004881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188400761) 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, 45509 + ... + 49475.

It is an arithmetic number, because the mean of its divisors is an integer number (14221312).

Almost surely, 2^188400764 is an apocalyptic number.

It is an amenable number.

188400764 is a deficient number, since it is larger than the sum of its proper divisors (152910724).

188400764 is a wasteful number, since it uses less digits than its factorization.

188400764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385 (or 4383 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 188400764 is about 13725.9157800126. The cubic root of 188400764 is about 573.2722062407.

The spelling of 188400764 in words is "one hundred eighty-eight million, four hundred thousand, seven hundred sixty-four".