393899012 has 24 divisors (see below), whose sum is σ = 774626496. Its totient is φ = 173894688.

The previous prime is 393898997. The next prime is 393899041. The reversal of 393899012 is 210998393.

It is a super-2 number, since 2×393899012² = 310312863309152288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163478 + ... + 165869.

It is an arithmetic number, because the mean of its divisors is an integer number (32276104).

Almost surely, 2^393899012 is an apocalyptic number.

It is an amenable number.

393899012 is a deficient number, since it is larger than the sum of its proper divisors (380727484).

393899012 is a wasteful number, since it uses less digits than its factorization.

393899012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329387 (or 329385 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 393899012 is about 19846.8892272819. The cubic root of 393899012 is about 733.0410525769.

The spelling of 393899012 in words is "three hundred ninety-three million, eight hundred ninety-nine thousand, twelve".