3990622 has 4 divisors (see below), whose sum is σ = 5985936. Its totient is φ = 1995310.

The previous prime is 3990619. The next prime is 3990641. The reversal of 3990622 is 2260993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2260993 = 7 ⋅322999.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 997654 + ... + 997657.

It is an arithmetic number, because the mean of its divisors is an integer number (1496484).

Almost surely, 2^3990622 is an apocalyptic number.

3990622 is a deficient number, since it is larger than the sum of its proper divisors (1995314).

3990622 is a wasteful number, since it uses less digits than its factorization.

3990622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995313.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 3990622 is about 1997.6541242167. The cubic root of 3990622 is about 158.6159527288.

The spelling of 3990622 in words is "three million, nine hundred ninety thousand, six hundred twenty-two".