391022319072 has 864 divisors, whose sum is σ = 1375649702784. Its totient is φ = 96119654400.

The previous prime is 391022319071. The next prime is 391022319089. The reversal of 391022319072 is 270913220193.

391022319072 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 391022319072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391022319071) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5836153983 + ... + 5836154049.

It is an arithmetic number, because the mean of its divisors is an integer number (1592187156).

Almost surely, 2^391022319072 is an apocalyptic number.

391022319072 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 391022319072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687824851392).

391022319072 is an abundant number, since it is smaller than the sum of its proper divisors (984627383712).

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

391022319072 is a wasteful number, since it uses less digits than its factorization.

391022319072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The spelling of 391022319072 in words is "three hundred ninety-one billion, twenty-two million, three hundred nineteen thousand, seventy-two".