391004258172 has 24 divisors (see below), whose sum is σ = 995283566592. Its totient is φ = 118486138800.

The previous prime is 391004258171. The next prime is 391004258201. The reversal of 391004258172 is 271852400193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391004258171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481076604 + ... + 1481076867.

It is an arithmetic number, because the mean of its divisors is an integer number (41470148608).

Almost surely, 2^391004258172 is an apocalyptic number.

It is an amenable number.

391004258172 is an abundant number, since it is smaller than the sum of its proper divisors (604279308420).

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

391004258172 is a wasteful number, since it uses less digits than its factorization.

391004258172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962153489 (or 2962153487 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 391004258172 in words is "three hundred ninety-one billion, four million, two hundred fifty-eight thousand, one hundred seventy-two".