64383990 has 32 divisors (see below), whose sum is σ = 168569856. Its totient is φ = 15608160.

The previous prime is 64383967. The next prime is 64384009. The reversal of 64383990 is 9938346.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97222 + ... + 97881.

It is an arithmetic number, because the mean of its divisors is an integer number (5267808).

Almost surely, 2^64383990 is an apocalyptic number.

64383990 is an abundant number, since it is smaller than the sum of its proper divisors (104185866).

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

64383990 is a wasteful number, since it uses less digits than its factorization.

64383990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195124.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 64383990 is about 8023.9634844633. The cubic root of 64383990 is about 400.7983845617.

The spelling of 64383990 in words is "sixty-four million, three hundred eighty-three thousand, nine hundred ninety".