393445252 has 6 divisors (see below), whose sum is σ = 688529198. Its totient is φ = 196722624.

The previous prime is 393445189. The next prime is 393445259. The reversal of 393445252 is 252544393.

It can be written as a sum of positive squares in only one way, i.e., 392990976 + 454276 = 19824^2 + 674^2 .

It is not an unprimeable number, because it can be changed into a prime (393445259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49180653 + ... + 49180660.

Almost surely, 2^393445252 is an apocalyptic number.

It is an amenable number.

393445252 is a deficient number, since it is larger than the sum of its proper divisors (295083946).

393445252 is a wasteful number, since it uses less digits than its factorization.

393445252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98361317 (or 98361315 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 393445252 is about 19835.4544187926. The cubic root of 393445252 is about 732.7594638919.

The spelling of 393445252 in words is "three hundred ninety-three million, four hundred forty-five thousand, two hundred fifty-two".