3990222 has 20 divisors (see below), whose sum is σ = 8941416. Its totient is φ = 1330020.

The previous prime is 3990187. The next prime is 3990241. The reversal of 3990222 is 2220993.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 12154 + ... + 12477.

Almost surely, 2^3990222 is an apocalyptic number.

3990222 is an abundant number, since it is smaller than the sum of its proper divisors (4951194).

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

3990222 is a wasteful number, since it uses less digits than its factorization.

3990222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24645 (or 24636 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3990222 is about 1997.5540042762. The cubic root of 3990222 is about 158.6106529284.

The spelling of 3990222 in words is "three million, nine hundred ninety thousand, two hundred twenty-two".