394164436 has 6 divisors (see below), whose sum is σ = 689787770. Its totient is φ = 197082216.

The previous prime is 394164377. The next prime is 394164437. The reversal of 394164436 is 634461493.

It can be written as a sum of positive squares in only one way, i.e., 337824400 + 56340036 = 18380^2 + 7506^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394164437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49270551 + ... + 49270558.

Almost surely, 2^394164436 is an apocalyptic number.

It is an amenable number.

394164436 is a deficient number, since it is larger than the sum of its proper divisors (295623334).

394164436 is a wasteful number, since it uses less digits than its factorization.

394164436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98541113 (or 98541111 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 394164436 is about 19853.5748921951. The cubic root of 394164436 is about 733.2056658378.

The spelling of 394164436 in words is "three hundred ninety-four million, one hundred sixty-four thousand, four hundred thirty-six".