978518572 has 24 divisors (see below), whose sum is σ = 1837984176. Its totient is φ = 454169088.

The previous prime is 978518557. The next prime is 978518579. The reversal of 978518572 is 275815879.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (978518579) 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, 93598 + ... + 103525.

It is an arithmetic number, because the mean of its divisors is an integer number (76582674).

Almost surely, 2^978518572 is an apocalyptic number.

It is an amenable number.

978518572 is a deficient number, since it is larger than the sum of its proper divisors (859465604).

978518572 is a wasteful number, since it uses less digits than its factorization.

978518572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197217 (or 197215 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 52.

The square root of 978518572 is about 31281.2814954886. The cubic root of 978518572 is about 992.7876307887.

The spelling of 978518572 in words is "nine hundred seventy-eight million, five hundred eighteen thousand, five hundred seventy-two".