64778308 has 12 divisors (see below), whose sum is σ = 129556672. Its totient is φ = 27762120.

The previous prime is 64778303. The next prime is 64778317. The reversal of 64778308 is 80387746.

64778308 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (64778303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156728 + ... + 1156783.

Almost surely, 2^64778308 is an apocalyptic number.

It is an amenable number.

64778308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64778308 is a wasteful number, since it uses less digits than its factorization.

64778308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313522 (or 2313520 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 64778308 is about 8048.4972510401. The cubic root of 64778308 is about 401.6149460980.

The spelling of 64778308 in words is "sixty-four million, seven hundred seventy-eight thousand, three hundred eight".