393227646 has 96 divisors (see below), whose sum is σ = 1002443040. Its totient is φ = 102057984.

The previous prime is 393227603. The next prime is 393227671. The reversal of 393227646 is 646722393.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 393227598 and 393227607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143586 + ... + 146298.

It is an arithmetic number, because the mean of its divisors is an integer number (10442115).

Almost surely, 2^393227646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393227646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501221520).

393227646 is an abundant number, since it is smaller than the sum of its proper divisors (609215394).

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

393227646 is a wasteful number, since it uses less digits than its factorization.

393227646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2771 counting only the distinct ones).

The product of its digits is 326592, while the sum is 42.

The square root of 393227646 is about 19829.9683812153. The cubic root of 393227646 is about 732.6243478787.

The spelling of 393227646 in words is "three hundred ninety-three million, two hundred twenty-seven thousand, six hundred forty-six".