393621132 has 12 divisors (see below), whose sum is σ = 918449336. Its totient is φ = 131207040.

The previous prime is 393621083. The next prime is 393621161. The reversal of 393621132 is 231126393.

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

It is a super-2 number, since 2×393621132² = 309875191113922848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 393621132.

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, 16400869 + ... + 16400892.

Almost surely, 2^393621132 is an apocalyptic number.

It is an amenable number.

393621132 is an abundant number, since it is smaller than the sum of its proper divisors (524828204).

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

393621132 is a wasteful number, since it uses less digits than its factorization.

393621132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32801768 (or 32801766 counting only the distinct ones).

The product of its digits is 5832, while the sum is 30.

The square root of 393621132 is about 19839.8873988740. The cubic root of 393621132 is about 732.8686349771.

The spelling of 393621132 in words is "three hundred ninety-three million, six hundred twenty-one thousand, one hundred thirty-two".