64378332 has 36 divisors (see below), whose sum is σ = 164027136. Its totient is φ = 21288960.

The previous prime is 64378319. The next prime is 64378339. The reversal of 64378332 is 23387346.

64378332 is a `hidden beast` number, since 643 + 7 + 8 + 3 + 3 + 2 = 666.

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

It is a super-2 number, since 2×64378332² = 8289139262204448, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64378339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2469 + ... + 11612.

Almost surely, 2^64378332 is an apocalyptic number.

It is an amenable number.

64378332 is an abundant number, since it is smaller than the sum of its proper divisors (99648804).

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

64378332 is a wasteful number, since it uses less digits than its factorization.

64378332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14218 (or 14213 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 64378332 is about 8023.6109078145. The cubic root of 64378332 is about 400.7866436320.

The spelling of 64378332 in words is "sixty-four million, three hundred seventy-eight thousand, three hundred thirty-two".