399222012 has 36 divisors (see below), whose sum is σ = 1083604200. Its totient is φ = 114063264.

The previous prime is 399222011. The next prime is 399222013. The reversal of 399222012 is 210222993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (399222011) and next prime (399222013).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399222011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 338887 + ... + 340062.

Almost surely, 2^399222012 is an apocalyptic number.

It is an amenable number.

399222012 is an abundant number, since it is smaller than the sum of its proper divisors (684382188).

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

399222012 is a wasteful number, since it uses less digits than its factorization.

399222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678970 (or 678961 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 399222012 is about 19980.5408335210. The cubic root of 399222012 is about 736.3283009800.

The spelling of 399222012 in words is "three hundred ninety-nine million, two hundred twenty-two thousand, twelve".