394380636 has 48 divisors (see below), whose sum is σ = 1022988288. Its totient is φ = 117432000.

The previous prime is 394380617. The next prime is 394380643. The reversal of 394380636 is 636083493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35940 + ... + 45611.

It is an arithmetic number, because the mean of its divisors is an integer number (21312256).

Almost surely, 2^394380636 is an apocalyptic number.

It is an amenable number.

394380636 is an abundant number, since it is smaller than the sum of its proper divisors (628607652).

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

394380636 is a wasteful number, since it uses less digits than its factorization.

394380636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81602 (or 81600 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 394380636 is about 19859.0190090044. The cubic root of 394380636 is about 733.3396962717.

The spelling of 394380636 in words is "three hundred ninety-four million, three hundred eighty thousand, six hundred thirty-six".