189657960 has 32 divisors (see below), whose sum is σ = 568974240. Its totient is φ = 50575424.

The previous prime is 189657959. The next prime is 189657961. The reversal of 189657960 is 69756981.

It is an interprime number because it is at equal distance from previous prime (189657959) and next prime (189657961).

It is not an unprimeable number, because it can be changed into a prime (189657961) 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, 790122 + ... + 790361.

It is an arithmetic number, because the mean of its divisors is an integer number (17780445).

Almost surely, 2^189657960 is an apocalyptic number.

189657960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189657960 is an abundant number, since it is smaller than the sum of its proper divisors (379316280).

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

189657960 is a wasteful number, since it uses less digits than its factorization.

189657960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580497 (or 1580493 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 189657960 is about 13771.6360683835. The cubic root of 189657960 is about 574.5445265106.

The spelling of 189657960 in words is "one hundred eighty-nine million, six hundred fifty-seven thousand, nine hundred sixty".