189005640 has 64 divisors (see below), whose sum is σ = 580219200. Its totient is φ = 49228032.

The previous prime is 189005627. The next prime is 189005653. The reversal of 189005640 is 46500981.

It is an interprime number because it is at equal distance from previous prime (189005627) and next prime (189005653).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13155 + ... + 23474.

It is an arithmetic number, because the mean of its divisors is an integer number (9065925).

Almost surely, 2^189005640 is an apocalyptic number.

189005640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189005640 is an abundant number, since it is smaller than the sum of its proper divisors (391213560).

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

189005640 is a wasteful number, since it uses less digits than its factorization.

189005640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36686 (or 36682 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 189005640 is about 13747.9322081541. The cubic root of 189005640 is about 573.8850632045.

The spelling of 189005640 in words is "one hundred eighty-nine million, five thousand, six hundred forty".