391624396 has 6 divisors (see below), whose sum is σ = 685342700. Its totient is φ = 195812196.

The previous prime is 391624357. The next prime is 391624399. The reversal of 391624396 is 693426193.

It is not an unprimeable number, because it can be changed into a prime (391624399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48953046 + ... + 48953053.

Almost surely, 2^391624396 is an apocalyptic number.

It is an amenable number.

391624396 is a deficient number, since it is larger than the sum of its proper divisors (293718304).

391624396 is a wasteful number, since it uses less digits than its factorization.

391624396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97906103 (or 97906101 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 391624396 is about 19789.5021665529. The cubic root of 391624396 is about 731.6273173306.

The spelling of 391624396 in words is "three hundred ninety-one million, six hundred twenty-four thousand, three hundred ninety-six".