394180940 has 12 divisors (see below), whose sum is σ = 827780016. Its totient is φ = 157672368.

The previous prime is 394180933. The next prime is 394180979. The reversal of 394180940 is 49081493.

It is a super-2 number, since 2×394180940² = 310757226918567200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394180894 and 394180903.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9854504 + ... + 9854543.

It is an arithmetic number, because the mean of its divisors is an integer number (68981668).

Almost surely, 2^394180940 is an apocalyptic number.

It is an amenable number.

394180940 is an abundant number, since it is smaller than the sum of its proper divisors (433599076).

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

394180940 is a wasteful number, since it uses less digits than its factorization.

394180940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19709056 (or 19709054 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 394180940 is about 19853.9905308731. The cubic root of 394180940 is about 733.2158990098.

The spelling of 394180940 in words is "three hundred ninety-four million, one hundred eighty thousand, nine hundred forty".