393998982 has 16 divisors (see below), whose sum is σ = 848613360. Its totient is φ = 121230432.

The previous prime is 393998911. The next prime is 393999019. The reversal of 393998982 is 289899393.

It is a congruent number.

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, 2525557 + ... + 2525712.

It is an arithmetic number, because the mean of its divisors is an integer number (53038335).

Almost surely, 2^393998982 is an apocalyptic number.

393998982 is an abundant number, since it is smaller than the sum of its proper divisors (454614378).

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

393998982 is a wasteful number, since it uses less digits than its factorization.

393998982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051287.

The product of its digits is 7558272, while the sum is 60.

The square root of 393998982 is about 19849.4075982131. The cubic root of 393998982 is about 733.1030616309.

The spelling of 393998982 in words is "three hundred ninety-three million, nine hundred ninety-eight thousand, nine hundred eighty-two".