978816674 has 12 divisors (see below), whose sum is σ = 1613834502. Its totient is φ = 444916560.

The previous prime is 978816659. The next prime is 978816679. The reversal of 978816674 is 476618879.

It can be written as a sum of positive squares in only one way, i.e., 501088225 + 477728449 = 22385^2 + 21857^2 .

It is not an unprimeable number, because it can be changed into a prime (978816679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2022107 + ... + 2022590.

Almost surely, 2^978816674 is an apocalyptic number.

978816674 is a deficient number, since it is larger than the sum of its proper divisors (635017828).

978816674 is a wasteful number, since it uses less digits than its factorization.

978816674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044721 (or 4044710 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 978816674 is about 31286.0459949799. The cubic root of 978816674 is about 992.8884368910. Note that the first 3 decimals are identical.

It can be divided in two parts, 9788 and 16674, that added together give a palindrome (26462).

The spelling of 978816674 in words is "nine hundred seventy-eight million, eight hundred sixteen thousand, six hundred seventy-four".