393115212 has 72 divisors (see below), whose sum is σ = 1143297792. Its totient is φ = 111564000.

The previous prime is 393115211. The next prime is 393115223. The reversal of 393115212 is 212511393.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (393115211) 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 23 ways as a sum of consecutive naturals, for example, 32887 + ... + 43217.

It is an arithmetic number, because the mean of its divisors is an integer number (15879136).

Almost surely, 2^393115212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393115212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571648896).

393115212 is an abundant number, since it is smaller than the sum of its proper divisors (750182580).

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

393115212 is a wasteful number, since it uses less digits than its factorization.

393115212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499 (or 10494 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 393115212 is about 19827.1332269696. The cubic root of 393115212 is about 732.5545157778.

The spelling of 393115212 in words is "three hundred ninety-three million, one hundred fifteen thousand, two hundred twelve".