391126404 has 12 divisors (see below), whose sum is σ = 912628304. Its totient is φ = 130375464.

The previous prime is 391126403. The next prime is 391126423. The reversal of 391126404 is 404621193.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (391126403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16296922 + ... + 16296945.

Almost surely, 2^391126404 is an apocalyptic number.

It is an amenable number.

391126404 is an abundant number, since it is smaller than the sum of its proper divisors (521501900).

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

391126404 is a wasteful number, since it uses less digits than its factorization.

391126404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32593874 (or 32593872 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 391126404 is about 19776.9159375268. The cubic root of 391126404 is about 731.3170718521.

Adding to 391126404 its reverse (404621193), we get a palindrome (795747597).

The spelling of 391126404 in words is "three hundred ninety-one million, one hundred twenty-six thousand, four hundred four".