189188370 has 48 divisors (see below), whose sum is σ = 562161600. Its totient is φ = 43242912.

The previous prime is 189188303. The next prime is 189188387. The reversal of 189188370 is 73881981.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149520 + ... + 150779.

It is an arithmetic number, because the mean of its divisors is an integer number (11711700).

Almost surely, 2^189188370 is an apocalyptic number.

189188370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189188370 is an abundant number, since it is smaller than the sum of its proper divisors (372973230).

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

189188370 is a wasteful number, since it uses less digits than its factorization.

189188370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300319 (or 300316 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 189188370 is about 13754.5763293531. The cubic root of 189188370 is about 574.0699470013.

The spelling of 189188370 in words is "one hundred eighty-nine million, one hundred eighty-eight thousand, three hundred seventy".