189849680 has 40 divisors (see below), whose sum is σ = 452174184. Its totient is φ = 74086400.

The previous prime is 189849679. The next prime is 189849683. The reversal of 189849680 is 86948981.

It can be written as a sum of positive squares in 4 ways, for example, as 13278736 + 176570944 = 3644^2 + 13288^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×189849680² = 72085801992204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189849683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25661 + ... + 32220.

Almost surely, 2^189849680 is an apocalyptic number.

189849680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189849680 is an abundant number, since it is smaller than the sum of its proper divisors (262324504).

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

189849680 is a wasteful number, since it uses less digits than its factorization.

189849680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57935 (or 57929 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 189849680 is about 13778.5949936850. The cubic root of 189849680 is about 574.7380583842.

The spelling of 189849680 in words is "one hundred eighty-nine million, eight hundred forty-nine thousand, six hundred eighty".