978928280 has 32 divisors (see below), whose sum is σ = 2402825040. Its totient is φ = 355973760.

The previous prime is 978928273. The next prime is 978928283. The reversal of 978928280 is 82829879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978928283) 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 7 ways as a sum of consecutive naturals, for example, 1111979 + ... + 1112858.

Almost surely, 2^978928280 is an apocalyptic number.

It is an amenable number.

978928280 is an abundant number, since it is smaller than the sum of its proper divisors (1423896760).

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

978928280 is a wasteful number, since it uses less digits than its factorization.

978928280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224859 (or 2224855 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 978928280 is about 31287.8295827627. The cubic root of 978928280 is about 992.9261722840.

The spelling of 978928280 in words is "nine hundred seventy-eight million, nine hundred twenty-eight thousand, two hundred eighty".