189955700 has 36 divisors (see below), whose sum is σ = 449679552. Its totient is φ = 69074400.

The previous prime is 189955697. The next prime is 189955721. The reversal of 189955700 is 7559981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85244 + ... + 87443.

Almost surely, 2^189955700 is an apocalyptic number.

189955700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189955700 is an abundant number, since it is smaller than the sum of its proper divisors (259723852).

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

189955700 is a wasteful number, since it uses less digits than its factorization.

189955700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172712 (or 172705 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 189955700 is about 13782.4417285182. The cubic root of 189955700 is about 574.8450243969.

The spelling of 189955700 in words is "one hundred eighty-nine million, nine hundred fifty-five thousand, seven hundred".