978090980 has 24 divisors (see below), whose sum is σ = 2054655288. Its totient is φ = 391109888.

The previous prime is 978090979. The next prime is 978090983. The reversal of 978090980 is 89090879.

It can be written as a sum of positive squares in 4 ways, for example, as 463799296 + 514291684 = 21536^2 + 22678^2 .

It is not an unprimeable number, because it can be changed into a prime (978090983) 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 7 ways as a sum of consecutive naturals, for example, 78542 + ... + 90138.

It is an arithmetic number, because the mean of its divisors is an integer number (85610637).

Almost surely, 2^978090980 is an apocalyptic number.

It is an amenable number.

978090980 is an abundant number, since it is smaller than the sum of its proper divisors (1076564308).

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

978090980 is a wasteful number, since it uses less digits than its factorization.

978090980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15823 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 978090980 is about 31274.4461181969. The cubic root of 978090980 is about 992.6430006272.

The spelling of 978090980 in words is "nine hundred seventy-eight million, ninety thousand, nine hundred eighty".