391606676 has 12 divisors (see below), whose sum is σ = 701249472. Its totient is φ = 191249688.

The previous prime is 391606673. The next prime is 391606687. The reversal of 391606676 is 676606193.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391606673) 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, 1138220 + ... + 1138563.

It is an arithmetic number, because the mean of its divisors is an integer number (58437456).

Almost surely, 2^391606676 is an apocalyptic number.

It is an amenable number.

391606676 is a deficient number, since it is larger than the sum of its proper divisors (309642796).

391606676 is a wasteful number, since it uses less digits than its factorization.

391606676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276830 (or 2276828 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 391606676 is about 19789.0544493667. The cubic root of 391606676 is about 731.6162824107.

The spelling of 391606676 in words is "three hundred ninety-one million, six hundred six thousand, six hundred seventy-six".