64878684 has 48 divisors (see below), whose sum is σ = 168661920. Its totient is φ = 19272960.

The previous prime is 64878683. The next prime is 64878703. The reversal of 64878684 is 48687846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2647 + ... + 11694.

It is an arithmetic number, because the mean of its divisors is an integer number (3513790).

Almost surely, 2^64878684 is an apocalyptic number.

It is an amenable number.

64878684 is an abundant number, since it is smaller than the sum of its proper divisors (103783236).

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

64878684 is a wasteful number, since it uses less digits than its factorization.

64878684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390 (or 14388 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 51.

The square root of 64878684 is about 8054.7305355300. The cubic root of 64878684 is about 401.8222773233.

The spelling of 64878684 in words is "sixty-four million, eight hundred seventy-eight thousand, six hundred eighty-four".