394737424 has 15 divisors (see below), whose sum is σ = 764957767. Its totient is φ = 197328976.

The previous prime is 394737403. The next prime is 394737437. The reversal of 394737424 is 424737493.

The square root of 394737424 is 19868.

It is a perfect power (a square), and thus also a powerful number.

It is a super-4 number, since 4×394737424⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 76989 + ... + 81955.

Almost surely, 2^394737424 is an apocalyptic number.

394737424 is the 19868-th square number.

It is an amenable number.

394737424 is a deficient number, since it is larger than the sum of its proper divisors (370220343).

394737424 is an frugal number, since it uses more digits than its factorization.

394737424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942 (or 4969 counting only the distinct ones).

The product of its digits is 508032, while the sum is 43.

The cubic root of 394737424 is about 733.5607753656.

The spelling of 394737424 in words is "three hundred ninety-four million, seven hundred thirty-seven thousand, four hundred twenty-four".