391255946 has 8 divisors (see below), whose sum is σ = 592077924. Its totient is φ = 193896640.

The previous prime is 391255939. The next prime is 391255951. The reversal of 391255946 is 649552193.

It can be written as a sum of positive squares in 2 ways, for example, as 238362721 + 152893225 = 15439^2 + 12365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 391255897 and 391255906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865385 + ... + 865836.

Almost surely, 2^391255946 is an apocalyptic number.

391255946 is a deficient number, since it is larger than the sum of its proper divisors (200821978).

391255946 is a wasteful number, since it uses less digits than its factorization.

391255946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731336.

The product of its digits is 291600, while the sum is 44.

The square root of 391255946 is about 19780.1907473108. The cubic root of 391255946 is about 731.3978009276.

The spelling of 391255946 in words is "three hundred ninety-one million, two hundred fifty-five thousand, nine hundred forty-six".