391423952 has 40 divisors (see below), whose sum is σ = 767200896. Its totient is φ = 193452416.

The previous prime is 391423919. The next prime is 391423957. The reversal of 391423952 is 259324193.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391423957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702458 + ... + 703014.

Almost surely, 2^391423952 is an apocalyptic number.

It is an amenable number.

391423952 is a deficient number, since it is larger than the sum of its proper divisors (375776944).

391423952 is a wasteful number, since it uses less digits than its factorization.

391423952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 989 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 391423952 is about 19784.4371160769. The cubic root of 391423952 is about 731.5024737863.

The spelling of 391423952 in words is "three hundred ninety-one million, four hundred twenty-three thousand, nine hundred fifty-two".