393973480 has 16 divisors (see below), whose sum is σ = 886440420. Its totient is φ = 157589376.

The previous prime is 393973477. The next prime is 393973507. The reversal of 393973480 is 84379393.

It can be written as a sum of positive squares in 2 ways, for example, as 389588644 + 4384836 = 19738^2 + 2094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 393973480.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4924629 + ... + 4924708.

Almost surely, 2^393973480 is an apocalyptic number.

It is an amenable number.

393973480 is an abundant number, since it is smaller than the sum of its proper divisors (492466940).

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

393973480 is a wasteful number, since it uses less digits than its factorization.

393973480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849348 (or 9849344 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 393973480 is about 19848.7652008884. The cubic root of 393973480 is about 733.0872443331.

The spelling of 393973480 in words is "three hundred ninety-three million, nine hundred seventy-three thousand, four hundred eighty".