328778716 has 24 divisors (see below), whose sum is σ = 669967200. Its totient is φ = 138245952.

The previous prime is 328778701. The next prime is 328778729. The reversal of 328778716 is 617877823.

It is a self number, because there is not a number n which added to its sum of digits gives 328778716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109291 + ... + 112258.

It is an arithmetic number, because the mean of its divisors is an integer number (27915300).

Almost surely, 2^328778716 is an apocalyptic number.

It is an amenable number.

328778716 is an abundant number, since it is smaller than the sum of its proper divisors (341188484).

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

328778716 is a wasteful number, since it uses less digits than its factorization.

328778716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221613 (or 221611 counting only the distinct ones).

The product of its digits is 790272, while the sum is 49.

The square root of 328778716 is about 18132.2562302654. The cubic root of 328778716 is about 690.1887854223.

The spelling of 328778716 in words is "three hundred twenty-eight million, seven hundred seventy-eight thousand, seven hundred sixteen".