189870100 has 54 divisors (see below), whose sum is σ = 479298750. Its totient is φ = 65096640.

The previous prime is 189870091. The next prime is 189870137. The reversal of 189870100 is 1078981.

It can be written as a sum of positive squares in 3 ways, for example, as 11861136 + 178008964 = 3444^2 + 13342^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14475 + ... + 24274.

Almost surely, 2^189870100 is an apocalyptic number.

189870100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189870100 is an abundant number, since it is smaller than the sum of its proper divisors (289428650).

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

189870100 is a wasteful number, since it uses less digits than its factorization.

189870100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38777 (or 38763 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 189870100 is about 13779.3359781958. The cubic root of 189870100 is about 574.7586636870.

The spelling of 189870100 in words is "one hundred eighty-nine million, eight hundred seventy thousand, one hundred".