64363992 has 128 divisors (see below), whose sum is σ = 207705600. Its totient is φ = 16128000.

The previous prime is 64363987. The next prime is 64364017. The reversal of 64363992 is 29936346.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52992 + ... + 54192.

It is an arithmetic number, because the mean of its divisors is an integer number (1622700).

Almost surely, 2^64363992 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 64363992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103852800).

64363992 is an abundant number, since it is smaller than the sum of its proper divisors (143341608).

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

64363992 is a wasteful number, since it uses less digits than its factorization.

64363992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1253 counting only the distinct ones).

The product of its digits is 209952, while the sum is 42.

The square root of 64363992 is about 8022.7172454225. The cubic root of 64363992 is about 400.7568835814.

The spelling of 64363992 in words is "sixty-four million, three hundred sixty-three thousand, nine hundred ninety-two".