393289340 has 12 divisors (see below), whose sum is σ = 825907656. Its totient is φ = 157315728.

The previous prime is 393289333. The next prime is 393289349. The reversal of 393289340 is 43982393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393289349) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9832214 + ... + 9832253.

It is an arithmetic number, because the mean of its divisors is an integer number (68825638).

Almost surely, 2^393289340 is an apocalyptic number.

It is an amenable number.

393289340 is an abundant number, since it is smaller than the sum of its proper divisors (432618316).

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

393289340 is a wasteful number, since it uses less digits than its factorization.

393289340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19664476 (or 19664474 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 393289340 is about 19831.5238950515. The cubic root of 393289340 is about 732.6626600061.

The spelling of 393289340 in words is "three hundred ninety-three million, two hundred eighty-nine thousand, three hundred forty".