391254672 has 20 divisors (see below), whose sum is σ = 1010741360. Its totient is φ = 130418208.

The previous prime is 391254653. The next prime is 391254673. The reversal of 391254672 is 276452193.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 391254672.

It is not an unprimeable number, because it can be changed into a prime (391254673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4075522 + ... + 4075617.

It is an arithmetic number, because the mean of its divisors is an integer number (50537068).

Almost surely, 2^391254672 is an apocalyptic number.

It is an amenable number.

391254672 is an abundant number, since it is smaller than the sum of its proper divisors (619486688).

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

391254672 is a wasteful number, since it uses less digits than its factorization.

391254672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151150 (or 8151144 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 391254672 is about 19780.1585433484. The cubic root of 391254672 is about 731.3970070724.

The spelling of 391254672 in words is "three hundred ninety-one million, two hundred fifty-four thousand, six hundred seventy-two".