328918978 has 4 divisors (see below), whose sum is σ = 493378470. Its totient is φ = 164459488.

The previous prime is 328918939. The next prime is 328918981. The reversal of 328918978 is 879819823.

328918978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879819823 = 181 ⋅4860883.

It can be written as a sum of positive squares in only one way, i.e., 232349049 + 96569929 = 15243^2 + 9827^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82229743 + ... + 82229746.

Almost surely, 2^328918978 is an apocalyptic number.

328918978 is a deficient number, since it is larger than the sum of its proper divisors (164459492).

328918978 is a wasteful number, since it uses less digits than its factorization.

328918978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164459491.

The product of its digits is 1741824, while the sum is 55.

The square root of 328918978 is about 18136.1235659664. The cubic root of 328918978 is about 690.2869198122.

The spelling of 328918978 in words is "three hundred twenty-eight million, nine hundred eighteen thousand, nine hundred seventy-eight".