189371664 has 30 divisors (see below), whose sum is σ = 529978046. Its totient is φ = 63123840.

The previous prime is 189371657. The next prime is 189371671. The reversal of 189371664 is 466173981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (189371657) and next prime (189371671).

It can be written as a sum of positive squares in only one way, i.e., 161493264 + 27878400 = 12708^2 + 5280^2 .

It is a super-2 number, since 2×189371664² = 71723254252257792, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 657397 + ... + 657684.

Almost surely, 2^189371664 is an apocalyptic number.

It is an amenable number.

189371664 is an abundant number, since it is smaller than the sum of its proper divisors (340606382).

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

189371664 is a wasteful number, since it uses less digits than its factorization.

189371664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315095 (or 1315086 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 189371664 is about 13761.2377350295. The cubic root of 189371664 is about 574.2552818846.

The spelling of 189371664 in words is "one hundred eighty-nine million, three hundred seventy-one thousand, six hundred sixty-four".