393887404 has 24 divisors (see below), whose sum is σ = 726264000. Its totient is φ = 186402960.

The previous prime is 393887387. The next prime is 393887407. The reversal of 393887404 is 404788393.

It is a super-3 number, since 3×393887404³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (393887407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117747 + ... + 121045.

It is an arithmetic number, because the mean of its divisors is an integer number (30261000).

Almost surely, 2^393887404 is an apocalyptic number.

It is an amenable number.

393887404 is a deficient number, since it is larger than the sum of its proper divisors (332376596).

393887404 is a wasteful number, since it uses less digits than its factorization.

393887404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893 (or 4891 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 393887404 is about 19846.5967863511. The cubic root of 393887404 is about 733.0338517260.

The spelling of 393887404 in words is "three hundred ninety-three million, eight hundred eighty-seven thousand, four hundred four".