64978828 has 24 divisors (see below), whose sum is σ = 120787632. Its totient is φ = 30480384.

The previous prime is 64978817. The next prime is 64978829. The reversal of 64978828 is 82887946.

It is not an unprimeable number, because it can be changed into a prime (64978829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22651 + ... + 25357.

It is an arithmetic number, because the mean of its divisors is an integer number (5032818).

Almost surely, 2^64978828 is an apocalyptic number.

64978828 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64978828 is a deficient number, since it is larger than the sum of its proper divisors (55808804).

64978828 is a wasteful number, since it uses less digits than its factorization.

64978828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081 (or 3079 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 64978828 is about 8060.9446096596. The cubic root of 64978828 is about 402.0289163461.

The spelling of 64978828 in words is "sixty-four million, nine hundred seventy-eight thousand, eight hundred twenty-eight".