64390284 has 36 divisors (see below), whose sum is σ = 186017104. Its totient is φ = 18397152.

The previous prime is 64390273. The next prime is 64390309. The reversal of 64390284 is 48209346.

It is a happy number.

64390284 is a `hidden beast` number, since 643 + 9 + 0 + 2 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64390284² = 8292217347201312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127507 + ... + 128010.

Almost surely, 2^64390284 is an apocalyptic number.

It is an amenable number.

64390284 is an abundant number, since it is smaller than the sum of its proper divisors (121626820).

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

64390284 is a wasteful number, since it uses less digits than its factorization.

64390284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255534 (or 255529 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 64390284 is about 8024.3556750682. The cubic root of 64390284 is about 400.8114444483.

The spelling of 64390284 in words is "sixty-four million, three hundred ninety thousand, two hundred eighty-four".