64392768 has 84 divisors (see below), whose sum is σ = 201369168. Its totient is φ = 19511040.

The previous prime is 64392763. The next prime is 64392791. The reversal of 64392768 is 86729346.

It is not an unprimeable number, because it can be changed into a prime (64392761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1255 + ... + 11417.

It is an arithmetic number, because the mean of its divisors is an integer number (2397252).

Almost surely, 2^64392768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64392768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100684584).

64392768 is an abundant number, since it is smaller than the sum of its proper divisors (136976400).

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

64392768 is a wasteful number, since it uses less digits than its factorization.

64392768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10192 (or 10179 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64392768 is about 8024.5104523578. The cubic root of 64392768 is about 400.8165984496.

The spelling of 64392768 in words is "sixty-four million, three hundred ninety-two thousand, seven hundred sixty-eight".