391317628352 has 84 divisors (see below), whose sum is σ = 903533873904. Its totient is φ = 167664107520.

The previous prime is 391317628327. The next prime is 391317628363. The reversal of 391317628352 is 253826713193.

It is a self number, because there is not a number n which added to its sum of digits gives 391317628352.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14038493 + ... + 14066339.

Almost surely, 2^391317628352 is an apocalyptic number.

391317628352 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391317628352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451766936952).

391317628352 is an abundant number, since it is smaller than the sum of its proper divisors (512216245552).

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

391317628352 is a wasteful number, since it uses less digits than its factorization.

391317628352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32354 (or 32337 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 50.

The spelling of 391317628352 in words is "three hundred ninety-one billion, three hundred seventeen million, six hundred twenty-eight thousand, three hundred fifty-two".