393539220 has 72 divisors (see below), whose sum is σ = 1201724160. Its totient is φ = 104241600.

The previous prime is 393539161. The next prime is 393539233. The reversal of 393539220 is 22935393.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 19941 + ... + 34419.

Almost surely, 2^393539220 is an apocalyptic number.

393539220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393539220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600862080).

393539220 is an abundant number, since it is smaller than the sum of its proper divisors (808184940).

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

393539220 is a wasteful number, since it uses less digits than its factorization.

393539220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14645 (or 14640 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 36.

The square root of 393539220 is about 19837.8229652349. The cubic root of 393539220 is about 732.8177951421.

The spelling of 393539220 in words is "three hundred ninety-three million, five hundred thirty-nine thousand, two hundred twenty".