978712940 has 12 divisors (see below), whose sum is σ = 2055297216. Its totient is φ = 391485168.

The previous prime is 978712939. The next prime is 978712949. The reversal of 978712940 is 49217879.

It is not an unprimeable number, because it can be changed into a prime (978712949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24467804 + ... + 24467843.

It is an arithmetic number, because the mean of its divisors is an integer number (171274768).

Almost surely, 2^978712940 is an apocalyptic number.

It is an amenable number.

978712940 is an abundant number, since it is smaller than the sum of its proper divisors (1076584276).

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

978712940 is a wasteful number, since it uses less digits than its factorization.

978712940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48935656 (or 48935654 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 978712940 is about 31284.3881193160. The cubic root of 978712940 is about 992.8533605481.

The spelling of 978712940 in words is "nine hundred seventy-eight million, seven hundred twelve thousand, nine hundred forty".