188865420 has 48 divisors (see below), whose sum is σ = 551819520. Its totient is φ = 48174016.

The previous prime is 188865419. The next prime is 188865433. The reversal of 188865420 is 24568881.

188865420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67050 + ... + 69809.

It is an arithmetic number, because the mean of its divisors is an integer number (11496240).

Almost surely, 2^188865420 is an apocalyptic number.

188865420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188865420 is an abundant number, since it is smaller than the sum of its proper divisors (362954100).

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

188865420 is a wasteful number, since it uses less digits than its factorization.

188865420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136894 (or 136892 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 188865420 is about 13742.8315859578. The cubic root of 188865420 is about 573.7431096424.

The spelling of 188865420 in words is "one hundred eighty-eight million, eight hundred sixty-five thousand, four hundred twenty".