971791944 has 64 divisors (see below), whose sum is σ = 2575800000. Its totient is φ = 304472064.

The previous prime is 971791913. The next prime is 971791949. The reversal of 971791944 is 449197179.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (971791949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508639 + ... + 510545.

It is an arithmetic number, because the mean of its divisors is an integer number (40246875).

Almost surely, 2^971791944 is an apocalyptic number.

It is an amenable number.

971791944 is an abundant number, since it is smaller than the sum of its proper divisors (1604008056).

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

971791944 is a wasteful number, since it uses less digits than its factorization.

971791944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182 (or 3178 counting only the distinct ones).

The product of its digits is 571536, while the sum is 51.

The square root of 971791944 is about 31173.5776580103. The cubic root of 971791944 is about 990.5074920760.

The spelling of 971791944 in words is "nine hundred seventy-one million, seven hundred ninety-one thousand, nine hundred forty-four".