978612464 has 80 divisors (see below), whose sum is σ = 2063677440. Its totient is φ = 448208640.

The previous prime is 978612457. The next prime is 978612517. The reversal of 978612464 is 464216879.

It is a congruent number.

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, 1243079 + ... + 1243865.

It is an arithmetic number, because the mean of its divisors is an integer number (25795968).

Almost surely, 2^978612464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978612464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031838720).

978612464 is an abundant number, since it is smaller than the sum of its proper divisors (1085064976).

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

978612464 is a wasteful number, since it uses less digits than its factorization.

978612464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 978612464 is about 31282.7822292072. The cubic root of 978612464 is about 992.8193834938.

The spelling of 978612464 in words is "nine hundred seventy-eight million, six hundred twelve thousand, four hundred sixty-four".