391381696 has 28 divisors (see below), whose sum is σ = 801705280. Its totient is φ = 189377280.

The previous prime is 391381691. The next prime is 391381699. The reversal of 391381696 is 696183193.

It is not an unprimeable number, because it can be changed into a prime (391381691) 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, 96651 + ... + 100618.

Almost surely, 2^391381696 is an apocalyptic number.

It is an amenable number.

391381696 is an abundant number, since it is smaller than the sum of its proper divisors (410323584).

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

391381696 is a wasteful number, since it uses less digits than its factorization.

391381696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197312 (or 197302 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 391381696 is about 19783.3691771649. The cubic root of 391381696 is about 731.4761498301.

The spelling of 391381696 in words is "three hundred ninety-one million, three hundred eighty-one thousand, six hundred ninety-six".