189728952920 has 32 divisors (see below), whose sum is σ = 459727848720. Its totient is φ = 70053767040.

The previous prime is 189728952877. The next prime is 189728952947. The reversal of 189728952920 is 29259827981.

It is a super-2 number, since 2×189728952920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182431166 + ... + 182432205.

Almost surely, 2^189728952920 is an apocalyptic number.

189728952920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189728952920 is an abundant number, since it is smaller than the sum of its proper divisors (269998895800).

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

189728952920 is a wasteful number, since it uses less digits than its factorization.

189728952920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364863395 (or 364863391 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 189728952920 in words is "one hundred eighty-nine billion, seven hundred twenty-eight million, nine hundred fifty-two thousand, nine hundred twenty".