394428964 has 12 divisors (see below), whose sum is σ = 696702384. Its totient is φ = 195371144.

The previous prime is 394428953. The next prime is 394428997. The reversal of 394428964 is 469824493.

It is a super-2 number, since 2×394428964² = 311148415284226592, which contains 22 as substring.

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, 460354 + ... + 461209.

It is an arithmetic number, because the mean of its divisors is an integer number (58058532).

Almost surely, 2^394428964 is an apocalyptic number.

It is an amenable number.

394428964 is a deficient number, since it is larger than the sum of its proper divisors (302273420).

394428964 is a wasteful number, since it uses less digits than its factorization.

394428964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921674 (or 921672 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 394428964 is about 19860.2357488525. The cubic root of 394428964 is about 733.3696499003.

The spelling of 394428964 in words is "three hundred ninety-four million, four hundred twenty-eight thousand, nine hundred sixty-four".