328778564 has 12 divisors (see below), whose sum is σ = 583466688. Its totient is φ = 162073800.

The previous prime is 328778563. The next prime is 328778609. The reversal of 328778564 is 465877823.

It is not an unprimeable number, because it can be changed into a prime (328778563) 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, 578552 + ... + 579119.

It is an arithmetic number, because the mean of its divisors is an integer number (48622224).

Almost surely, 2^328778564 is an apocalyptic number.

It is an amenable number.

328778564 is a deficient number, since it is larger than the sum of its proper divisors (254688124).

328778564 is a wasteful number, since it uses less digits than its factorization.

328778564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157746 (or 1157744 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The square root of 328778564 is about 18132.2520388395. The cubic root of 328778564 is about 690.1886790602.

The spelling of 328778564 in words is "three hundred twenty-eight million, seven hundred seventy-eight thousand, five hundred sixty-four".