188430628 has 12 divisors (see below), whose sum is σ = 344090880. Its totient is φ = 90118952.

The previous prime is 188430611. The next prime is 188430631. The reversal of 188430628 is 826034881.

188430628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×188430628² = 71012203136948768, which contains 22 as substring.

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, 1023988 + ... + 1024171.

It is an arithmetic number, because the mean of its divisors is an integer number (28674240).

Almost surely, 2^188430628 is an apocalyptic number.

It is an amenable number.

188430628 is a deficient number, since it is larger than the sum of its proper divisors (155660252).

188430628 is a wasteful number, since it uses less digits than its factorization.

188430628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048186 (or 2048184 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 188430628 is about 13727.0036060314. The cubic root of 188430628 is about 573.3024950362.

The spelling of 188430628 in words is "one hundred eighty-eight million, four hundred thirty thousand, six hundred twenty-eight".