190660864 has 27 divisors (see below), whose sum is σ = 381018463. Its totient is φ = 95219968.

The previous prime is 190660861. The next prime is 190660901. The reversal of 190660864 is 468066091.

The square root of 190660864 is 13808.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×190660864² = 72703130122452992, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190660861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 220497 + ... + 221359.

Almost surely, 2^190660864 is an apocalyptic number.

190660864 is the 13808-th square number.

It is an amenable number.

190660864 is a deficient number, since it is larger than the sum of its proper divisors (190357599).

190660864 is an frugal number, since it uses more digits than its factorization.

190660864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The cubic root of 190660864 is about 575.5554697775. Note that the first 3 decimals are identical.

The spelling of 190660864 in words is "one hundred ninety million, six hundred sixty thousand, eight hundred sixty-four".