394164004 has 24 divisors (see below), whose sum is σ = 747847800. Its totient is φ = 180697344.

The previous prime is 394163999. The next prime is 394164019. The reversal of 394164004 is 400461493.

It can be written as a sum of positive squares in 4 ways, for example, as 220900 + 393943104 = 470^2 + 19848^2 .

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, 17689 + ... + 33184.

It is an arithmetic number, because the mean of its divisors is an integer number (31160325).

Almost surely, 2^394164004 is an apocalyptic number.

It is an amenable number.

394164004 is a deficient number, since it is larger than the sum of its proper divisors (353683796).

394164004 is a wasteful number, since it uses less digits than its factorization.

394164004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51039 (or 51037 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 394164004 is about 19853.5640125394. The cubic root of 394164004 is about 733.2053979759.

The spelling of 394164004 in words is "three hundred ninety-four million, one hundred sixty-four thousand, four".