978107640 has 64 divisors (see below), whose sum is σ = 2936424960. Its totient is φ = 260641920.

The previous prime is 978107639. The next prime is 978107653. The reversal of 978107640 is 46701879.

It is a junction number, because it is equal to n+sod(n) for n = 978107592 and 978107601.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 275557 + ... + 279083.

It is an arithmetic number, because the mean of its divisors is an integer number (45881640).

Almost surely, 2^978107640 is an apocalyptic number.

It is an amenable number.

978107640 is an abundant number, since it is smaller than the sum of its proper divisors (1958317320).

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

978107640 is a wasteful number, since it uses less digits than its factorization.

978107640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852 (or 5848 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 978107640 is about 31274.7124687023. The cubic root of 978107640 is about 992.6486365509.

The spelling of 978107640 in words is "nine hundred seventy-eight million, one hundred seven thousand, six hundred forty".