189455520 has 48 divisors (see below), whose sum is σ = 596786400. Its totient is φ = 50521344.

The previous prime is 189455489. The next prime is 189455573. The reversal of 189455520 is 25554981.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196870 + ... + 197829.

It is an arithmetic number, because the mean of its divisors is an integer number (12433050).

Almost surely, 2^189455520 is an apocalyptic number.

189455520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189455520 is an abundant number, since it is smaller than the sum of its proper divisors (407330880).

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

189455520 is a wasteful number, since it uses less digits than its factorization.

189455520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394717 (or 394709 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 189455520 is about 13764.2842167691. The cubic root of 189455520 is about 574.3400317073.

The spelling of 189455520 in words is "one hundred eighty-nine million, four hundred fifty-five thousand, five hundred twenty".