189555520 has 224 divisors, whose sum is σ = 577900800. Its totient is φ = 58705920.

The previous prime is 189555479. The next prime is 189555601. The reversal of 189555520 is 25555981.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1207282 + ... + 1207438.

Almost surely, 2^189555520 is an apocalyptic number.

189555520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189555520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288950400).

189555520 is an abundant number, since it is smaller than the sum of its proper divisors (388345280).

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

189555520 is a wasteful number, since it uses less digits than its factorization.

189555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 40.

The square root of 189555520 is about 13767.9163274622. The cubic root of 189555520 is about 574.4410649226.

The spelling of 189555520 in words is "one hundred eighty-nine million, five hundred fifty-five thousand, five hundred twenty".