64378912 has 96 divisors (see below), whose sum is σ = 144365760. Its totient is φ = 28062720.

The previous prime is 64378907. The next prime is 64378913. The reversal of 64378912 is 21987346.

It is not an unprimeable number, because it can be changed into a prime (64378913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055362 + ... + 1055422.

It is an arithmetic number, because the mean of its divisors is an integer number (1503810).

Almost surely, 2^64378912 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 64378912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72182880).

64378912 is an abundant number, since it is smaller than the sum of its proper divisors (79986848).

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

64378912 is a wasteful number, since it uses less digits than its factorization.

64378912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 178 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 64378912 is about 8023.6470510610. The cubic root of 64378912 is about 400.7878472231.

The spelling of 64378912 in words is "sixty-four million, three hundred seventy-eight thousand, nine hundred twelve".