978291328 has 32 divisors (see below), whose sum is σ = 2227361760. Its totient is φ = 419267328.

The previous prime is 978291319. The next prime is 978291329. The reversal of 978291328 is 823192879.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (978291329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545026 + ... + 546817.

It is an arithmetic number, because the mean of its divisors is an integer number (69605055).

Almost surely, 2^978291328 is an apocalyptic number.

It is an amenable number.

978291328 is an abundant number, since it is smaller than the sum of its proper divisors (1249070432).

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

978291328 is a wasteful number, since it uses less digits than its factorization.

978291328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091864 (or 1091852 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 978291328 is about 31277.6490165102. The cubic root of 978291328 is about 992.7107722581.

The spelling of 978291328 in words is "nine hundred seventy-eight million, two hundred ninety-one thousand, three hundred twenty-eight".