393980274 has 24 divisors (see below), whose sum is σ = 885240720. Its totient is φ = 131326596.

The previous prime is 393980269. The next prime is 393980303. The reversal of 393980274 is 472089393.

It is a happy number.

It is a super-2 number, since 2×393980274² = 310440912602230152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404844 + ... + 405815.

It is an arithmetic number, because the mean of its divisors is an integer number (36885030).

Almost surely, 2^393980274 is an apocalyptic number.

393980274 is an abundant number, since it is smaller than the sum of its proper divisors (491260446).

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

393980274 is an equidigital number, since it uses as much as digits as its factorization.

393980274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810676 (or 810664 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 393980274 is about 19848.9363442981. The cubic root of 393980274 is about 733.0914582937.

The spelling of 393980274 in words is "three hundred ninety-three million, nine hundred eighty thousand, two hundred seventy-four".