189539530 has 16 divisors (see below), whose sum is σ = 350392680. Its totient is φ = 73766592.

The previous prime is 189539509. The next prime is 189539531. The reversal of 189539530 is 35935981.

189539530 = 285² + 286² + ... + 839².

It can be written as a sum of positive squares in 4 ways, for example, as 183304521 + 6235009 = 13539^2 + 2497^2 .

It is not an unprimeable number, because it can be changed into a prime (189539531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255765 + ... + 256504.

Almost surely, 2^189539530 is an apocalyptic number.

189539530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189539530 is a deficient number, since it is larger than the sum of its proper divisors (160853150).

189539530 is a wasteful number, since it uses less digits than its factorization.

189539530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512313.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 189539530 is about 13767.3356173226. The cubic root of 189539530 is about 574.4249120985.

The spelling of 189539530 in words is "one hundred eighty-nine million, five hundred thirty-nine thousand, five hundred thirty".