394974156 has 24 divisors (see below), whose sum is σ = 944085744. Its totient is φ = 128446720.

The previous prime is 394974133. The next prime is 394974161. The reversal of 394974156 is 651479493.

It is a super-3 number, since 3×394974156³ (a number of 27 digits) contains 333 as substring.

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, 400905 + ... + 401888.

It is an arithmetic number, because the mean of its divisors is an integer number (39336906).

Almost surely, 2^394974156 is an apocalyptic number.

It is an amenable number.

394974156 is an abundant number, since it is smaller than the sum of its proper divisors (549111588).

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

394974156 is a wasteful number, since it uses less digits than its factorization.

394974156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802841 (or 802839 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 394974156 is about 19873.9567273354. The cubic root of 394974156 is about 733.7073897944.

The spelling of 394974156 in words is "three hundred ninety-four million, nine hundred seventy-four thousand, one hundred fifty-six".