390212212 has 36 divisors (see below), whose sum is σ = 759474156. Its totient is φ = 175219200.

The previous prime is 390212183. The next prime is 390212213. The reversal of 390212212 is 212212093.

It can be written as a sum of positive squares in 6 ways, for example, as 4639716 + 385572496 = 2154^2 + 19636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390212213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17212 + ... + 32812.

Almost surely, 2^390212212 is an apocalyptic number.

It is an amenable number.

390212212 is a deficient number, since it is larger than the sum of its proper divisors (369261944).

390212212 is a wasteful number, since it uses less digits than its factorization.

390212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15668 (or 15653 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 390212212 is about 19753.7898136029. The cubic root of 390212212 is about 730.7468505864.

The spelling of 390212212 in words is "three hundred ninety million, two hundred twelve thousand, two hundred twelve".