397791582 has 8 divisors (see below), whose sum is σ = 795583176. Its totient is φ = 132597192.

The previous prime is 397791547. The next prime is 397791607. The reversal of 397791582 is 285197793.

It is a sphenic number, since it is the product of 3 distinct primes.

397791582 is an admirable number.

It is a congruent number.

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, 33149293 + ... + 33149304.

It is an arithmetic number, because the mean of its divisors is an integer number (99447897).

Almost surely, 2^397791582 is an apocalyptic number.

397791582 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397791582 is a wasteful number, since it uses less digits than its factorization.

397791582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66298602.

The product of its digits is 952560, while the sum is 51.

The square root of 397791582 is about 19944.7131340614. The cubic root of 397791582 is about 735.4478163239.

It can be divided in two parts, 3977 and 91582, that added together give a palindrome (95559).

The spelling of 397791582 in words is "three hundred ninety-seven million, seven hundred ninety-one thousand, five hundred eighty-two".