971988426 has 24 divisors (see below), whose sum is σ = 2154952800. Its totient is φ = 316461096.

The previous prime is 971988323. The next prime is 971988431. The reversal of 971988426 is 624889179.

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, 627126 + ... + 628673.

It is an arithmetic number, because the mean of its divisors is an integer number (89789700).

Almost surely, 2^971988426 is an apocalyptic number.

971988426 is an abundant number, since it is smaller than the sum of its proper divisors (1182964374).

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

971988426 is a wasteful number, since it uses less digits than its factorization.

971988426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255850 (or 1255847 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 971988426 is about 31176.7289175757. The cubic root of 971988426 is about 990.5742429135.

The spelling of 971988426 in words is "nine hundred seventy-one million, nine hundred eighty-eight thousand, four hundred twenty-six".