393447948 has 24 divisors (see below), whose sum is σ = 918677760. Its totient is φ = 131058960.

The previous prime is 393447947. The next prime is 393448009. The reversal of 393447948 is 849744393.

It is a self number, because there is not a number n which added to its sum of digits gives 393447948.

It is not an unprimeable number, because it can be changed into a prime (393447941) 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, 8193 + ... + 29223.

It is an arithmetic number, because the mean of its divisors is an integer number (38278240).

Almost surely, 2^393447948 is an apocalyptic number.

It is an amenable number.

393447948 is an abundant number, since it is smaller than the sum of its proper divisors (525229812).

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

393447948 is a wasteful number, since it uses less digits than its factorization.

393447948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22597 (or 22595 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 393447948 is about 19835.5223777948. The cubic root of 393447948 is about 732.7611375809.

The spelling of 393447948 in words is "three hundred ninety-three million, four hundred forty-seven thousand, nine hundred forty-eight".