189689280 has 336 divisors, whose sum is σ = 700503552. Its totient is φ = 43366400.

The previous prime is 189689273. The next prime is 189689309. The reversal of 189689280 is 82986981.

189689280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2671645 + ... + 2671715.

It is an arithmetic number, because the mean of its divisors is an integer number (2084832).

Almost surely, 2^189689280 is an apocalyptic number.

189689280 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 189689280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350251776).

189689280 is an abundant number, since it is smaller than the sum of its proper divisors (510814272).

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

189689280 is a wasteful number, since it uses less digits than its factorization.

189689280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 189689280 is about 13772.7731412378. The cubic root of 189689280 is about 574.5761514142.

The spelling of 189689280 in words is "one hundred eighty-nine million, six hundred eighty-nine thousand, two hundred eighty".