64689192 has 40 divisors (see below), whose sum is σ = 181191450. Its totient is φ = 21562848.

The previous prime is 64689151. The next prime is 64689257. The reversal of 64689192 is 29198646.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52620516 + 12068676 = 7254^2 + 3474^2 .

It is a super-2 number, since 2×64689192² = 8369383123225728, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 49267 + ... + 50562.

Almost surely, 2^64689192 is an apocalyptic number.

It is an amenable number.

64689192 is an abundant number, since it is smaller than the sum of its proper divisors (116502258).

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

64689192 is a wasteful number, since it uses less digits than its factorization.

64689192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99847 (or 99834 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 64689192 is about 8042.9591569273. The cubic root of 64689192 is about 401.4306933570.

The spelling of 64689192 in words is "sixty-four million, six hundred eighty-nine thousand, one hundred ninety-two".