64979408 has 20 divisors (see below), whose sum is σ = 135582468. Its totient is φ = 29990400.

The previous prime is 64979399. The next prime is 64979419. The reversal of 64979408 is 80497946.

It can be written as a sum of positive squares in 2 ways, for example, as 30780304 + 34199104 = 5548^2 + 5848^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155993 + ... + 156408.

Almost surely, 2^64979408 is an apocalyptic number.

It is an amenable number.

64979408 is an abundant number, since it is smaller than the sum of its proper divisors (70603060).

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

64979408 is a wasteful number, since it uses less digits than its factorization.

64979408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312422 (or 312416 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 64979408 is about 8060.9805855119. The cubic root of 64979408 is about 402.0301125104.

The spelling of 64979408 in words is "sixty-four million, nine hundred seventy-nine thousand, four hundred eight".