978975312 has 120 divisors (see below), whose sum is σ = 3069999936. Its totient is φ = 267531264.

The previous prime is 978975307. The next prime is 978975343. The reversal of 978975312 is 213579879.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45048 + ... + 63144.

Almost surely, 2^978975312 is an apocalyptic number.

978975312 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978975312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534999968).

978975312 is an abundant number, since it is smaller than the sum of its proper divisors (2091024624).

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

978975312 is a wasteful number, since it uses less digits than its factorization.

978975312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18145 (or 18132 counting only the distinct ones).

The product of its digits is 952560, while the sum is 51.

The square root of 978975312 is about 31288.5811758859. The cubic root of 978975312 is about 992.9420735360.

The spelling of 978975312 in words is "nine hundred seventy-eight million, nine hundred seventy-five thousand, three hundred twelve".