189502720 has 144 divisors (see below), whose sum is σ = 508318272. Its totient is φ = 67092480.

The previous prime is 189502717. The next prime is 189502739. The reversal of 189502720 is 27205981.

It is a super-2 number, since 2×189502720² = 71822561774796800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 605284 + ... + 605596.

It is an arithmetic number, because the mean of its divisors is an integer number (3529988).

Almost surely, 2^189502720 is an apocalyptic number.

189502720 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 189502720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254159136).

189502720 is an abundant number, since it is smaller than the sum of its proper divisors (318815552).

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

189502720 is a wasteful number, since it uses less digits than its factorization.

189502720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 189502720 is about 13765.9986924306. The cubic root of 189502720 is about 574.3877238138.

The spelling of 189502720 in words is "one hundred eighty-nine million, five hundred two thousand, seven hundred twenty".