791163440 has 20 divisors (see below), whose sum is σ = 1839455184. Its totient is φ = 316465344.

The previous prime is 791163419. The next prime is 791163463. The reversal of 791163440 is 44361197.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 791163440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4944692 + ... + 4944851.

Almost surely, 2^791163440 is an apocalyptic number.

It is an amenable number.

791163440 is an abundant number, since it is smaller than the sum of its proper divisors (1048291744).

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

791163440 is a wasteful number, since it uses less digits than its factorization.

791163440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889556 (or 9889550 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 791163440 is about 28127.6276994701. The cubic root of 791163440 is about 924.8871311029.

The spelling of 791163440 in words is "seven hundred ninety-one million, one hundred sixty-three thousand, four hundred forty".