391284552 has 32 divisors (see below), whose sum is σ = 983188800. Its totient is φ = 129764544.

The previous prime is 391284539. The next prime is 391284611. The reversal of 391284552 is 255482193.

It is a self number, because there is not a number n which added to its sum of digits gives 391284552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36652 + ... + 46107.

It is an arithmetic number, because the mean of its divisors is an integer number (30724650).

Almost surely, 2^391284552 is an apocalyptic number.

It is an amenable number.

391284552 is an abundant number, since it is smaller than the sum of its proper divisors (591904248).

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

391284552 is a wasteful number, since it uses less digits than its factorization.

391284552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82965 (or 82961 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 391284552 is about 19780.9138312667. The cubic root of 391284552 is about 731.4156254539.

The spelling of 391284552 in words is "three hundred ninety-one million, two hundred eighty-four thousand, five hundred fifty-two".