393947412 has 12 divisors (see below), whose sum is σ = 919210656. Its totient is φ = 131315800.

The previous prime is 393947371. The next prime is 393947419. The reversal of 393947412 is 214749393.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393947419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16414464 + ... + 16414487.

It is an arithmetic number, because the mean of its divisors is an integer number (76600888).

Almost surely, 2^393947412 is an apocalyptic number.

It is an amenable number.

393947412 is an abundant number, since it is smaller than the sum of its proper divisors (525263244).

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

393947412 is a wasteful number, since it uses less digits than its factorization.

393947412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32828958 (or 32828956 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 393947412 is about 19848.1085244917. The cubic root of 393947412 is about 733.0710752754.

The spelling of 393947412 in words is "three hundred ninety-three million, nine hundred forty-seven thousand, four hundred twelve".