391798472 has 32 divisors (see below), whose sum is σ = 806069880. Its totient is φ = 177415680.

The previous prime is 391798457. The next prime is 391798481. The reversal of 391798472 is 274897193.

It can be written as a sum of positive squares in 4 ways, for example, as 356680996 + 35117476 = 18886^2 + 5926^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 391798472.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30029 + ... + 41052.

Almost surely, 2^391798472 is an apocalyptic number.

It is an amenable number.

391798472 is an abundant number, since it is smaller than the sum of its proper divisors (414271408).

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

391798472 is a wasteful number, since it uses less digits than its factorization.

391798472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71153 (or 71149 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 391798472 is about 19793.8998683938. The cubic root of 391798472 is about 731.7357034038.

The spelling of 391798472 in words is "three hundred ninety-one million, seven hundred ninety-eight thousand, four hundred seventy-two".