189708516 has 18 divisors (see below), whose sum is σ = 479541062. Its totient is φ = 63236160.

The previous prime is 189708511. The next prime is 189708523. The reversal of 189708516 is 615807981.

It can be written as a sum of positive squares in only one way, i.e., 167806116 + 21902400 = 12954^2 + 4680^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (189708511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2634805 + ... + 2634876.

Almost surely, 2^189708516 is an apocalyptic number.

It is an amenable number.

189708516 is an abundant number, since it is smaller than the sum of its proper divisors (289832546).

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

189708516 is a wasteful number, since it uses less digits than its factorization.

189708516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269691 (or 5269686 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 189708516 is about 13773.4714578424. The cubic root of 189708516 is about 574.5955729533.

The spelling of 189708516 in words is "one hundred eighty-nine million, seven hundred eight thousand, five hundred sixteen".