64456992 has 96 divisors (see below), whose sum is σ = 191237760. Its totient is φ = 21116160.

The previous prime is 64456991. The next prime is 64457027. The reversal of 64456992 is 29965446.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (64456991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52093 + ... + 53315.

It is an arithmetic number, because the mean of its divisors is an integer number (1992060).

Almost surely, 2^64456992 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 64456992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95618880).

64456992 is an abundant number, since it is smaller than the sum of its proper divisors (126780768).

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

64456992 is a wasteful number, since it uses less digits than its factorization.

64456992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1289 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 64456992 is about 8028.5111944868. The cubic root of 64456992 is about 400.9498095362.

The spelling of 64456992 in words is "sixty-four million, four hundred fifty-six thousand, nine hundred ninety-two".