64947378 has 16 divisors (see below), whose sum is σ = 137535840. Its totient is φ = 20375616.

The previous prime is 64947353. The next prime is 64947383. The reversal of 64947378 is 87374946.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318268 + ... + 318471.

It is an arithmetic number, because the mean of its divisors is an integer number (8595990).

Almost surely, 2^64947378 is an apocalyptic number.

64947378 is an abundant number, since it is smaller than the sum of its proper divisors (72588462).

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

64947378 is a wasteful number, since it uses less digits than its factorization.

64947378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636761.

The product of its digits is 1016064, while the sum is 48.

The square root of 64947378 is about 8058.9936096265. The cubic root of 64947378 is about 401.9640447038.

The spelling of 64947378 in words is "sixty-four million, nine hundred forty-seven thousand, three hundred seventy-eight".