978629520 has 80 divisors (see below), whose sum is σ = 3309556032. Its totient is φ = 237242880.

The previous prime is 978629503. The next prime is 978629543. The reversal of 978629520 is 25926879.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 978629520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182707 + ... + 187986.

Almost surely, 2^978629520 is an apocalyptic number.

It is an amenable number.

978629520 is an abundant number, since it is smaller than the sum of its proper divisors (2330926512).

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

978629520 is a wasteful number, since it uses less digits than its factorization.

978629520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370720 (or 370714 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 978629520 is about 31283.0548380429. The cubic root of 978629520 is about 992.8251513299.

The spelling of 978629520 in words is "nine hundred seventy-eight million, six hundred twenty-nine thousand, five hundred twenty".