978893680 has 40 divisors (see below), whose sum is σ = 2395717200. Its totient is φ = 370948608.

The previous prime is 978893659. The next prime is 978893683. The reversal of 978893680 is 86398879.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978893683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320485 + ... + 323524.

It is an arithmetic number, because the mean of its divisors is an integer number (59892930).

Almost surely, 2^978893680 is an apocalyptic number.

It is an amenable number.

978893680 is an abundant number, since it is smaller than the sum of its proper divisors (1416823520).

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

978893680 is a wasteful number, since it uses less digits than its factorization.

978893680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644041 (or 644035 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 978893680 is about 31287.2766472251. The cubic root of 978893680 is about 992.9144738953.

The spelling of 978893680 in words is "nine hundred seventy-eight million, eight hundred ninety-three thousand, six hundred eighty".