978949880 has 16 divisors (see below), whose sum is σ = 2202637320. Its totient is φ = 391579936.

The previous prime is 978949877. The next prime is 978949883. The reversal of 978949880 is 88949879.

It is an interprime number because it is at equal distance from previous prime (978949877) and next prime (978949883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978949883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12236834 + ... + 12236913.

Almost surely, 2^978949880 is an apocalyptic number.

It is an amenable number.

978949880 is an abundant number, since it is smaller than the sum of its proper divisors (1223687440).

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

978949880 is a wasteful number, since it uses less digits than its factorization.

978949880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24473758 (or 24473754 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 978949880 is about 31288.1747629995. The cubic root of 978949880 is about 992.9334751845.

The spelling of 978949880 in words is "nine hundred seventy-eight million, nine hundred forty-nine thousand, eight hundred eighty".