64864992 has 48 divisors (see below), whose sum is σ = 170689680. Its totient is φ = 21568512.

The previous prime is 64864981. The next prime is 64864997. The reversal of 64864992 is 29946846.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64864997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67588 + ... + 68540.

It is an arithmetic number, because the mean of its divisors is an integer number (3556035).

Almost surely, 2^64864992 is an apocalyptic number.

It is an amenable number.

64864992 is an abundant number, since it is smaller than the sum of its proper divisors (105824688).

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

64864992 is a wasteful number, since it uses less digits than its factorization.

64864992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1667 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 64864992 is about 8053.8805553596. The cubic root of 64864992 is about 401.7940084716.

It can be divided in two parts, 64864 and 992, that added together give a palindrome (65856).

The spelling of 64864992 in words is "sixty-four million, eight hundred sixty-four thousand, nine hundred ninety-two".