3990022 has 4 divisors (see below), whose sum is σ = 5985036. Its totient is φ = 1995010.

The previous prime is 3990011. The next prime is 3990029. The reversal of 3990022 is 2200993.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997504 + ... + 997507.

It is an arithmetic number, because the mean of its divisors is an integer number (1496259).

Almost surely, 2^3990022 is an apocalyptic number.

3990022 is a deficient number, since it is larger than the sum of its proper divisors (1995014).

3990022 is a wasteful number, since it uses less digits than its factorization.

3990022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995013.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 3990022 is about 1997.5039424241. The cubic root of 3990022 is about 158.6080028953.

It can be divided in two parts, 3 and 990022, that added together give a square (990025 = 995²).

The spelling of 3990022 in words is "three million, nine hundred ninety thousand, twenty-two".