394890356 has 24 divisors (see below), whose sum is σ = 800908416. Its totient is φ = 166854240.

The previous prime is 394890343. The next prime is 394890367. The reversal of 394890356 is 653098493.

It is a self number, because there is not a number n which added to its sum of digits gives 394890356.

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, 97331 + ... + 101306.

It is an arithmetic number, because the mean of its divisors is an integer number (33371184).

Almost surely, 2^394890356 is an apocalyptic number.

It is an amenable number.

394890356 is an abundant number, since it is smaller than the sum of its proper divisors (406018060).

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

394890356 is a wasteful number, since it uses less digits than its factorization.

394890356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198719 (or 198717 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 394890356 is about 19871.8483287288. The cubic root of 394890356 is about 733.6554969240.

The spelling of 394890356 in words is "three hundred ninety-four million, eight hundred ninety thousand, three hundred fifty-six".