978558426 has 24 divisors (see below), whose sum is σ = 2193321780. Its totient is φ = 314938176.

The previous prime is 978558419. The next prime is 978558433. The reversal of 978558426 is 624855879.

978558426 is a `hidden beast` number, since 97 + 85 + 58 + 426 = 666.

It is an interprime number because it is at equal distance from previous prime (978558419) and next prime (978558433).

It can be written as a sum of positive squares in 2 ways, for example, as 867361401 + 111197025 = 29451^2 + 10545^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 936795 + ... + 937838.

Almost surely, 2^978558426 is an apocalyptic number.

978558426 is an abundant number, since it is smaller than the sum of its proper divisors (1214763354).

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

978558426 is a wasteful number, since it uses less digits than its factorization.

978558426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874670 (or 1874667 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 978558426 is about 31281.9185153341. The cubic root of 978558426 is about 992.8011089935.

The spelling of 978558426 in words is "nine hundred seventy-eight million, five hundred fifty-eight thousand, four hundred twenty-six".