4006990 has 24 divisors (see below), whose sum is σ = 7813368. Its totient is φ = 1478880.

The previous prime is 4006979. The next prime is 4006993. The reversal of 4006990 is 996004.

4006990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505 + ... + 2875.

It is an arithmetic number, because the mean of its divisors is an integer number (325557).

Almost surely, 2^4006990 is an apocalyptic number.

4006990 is a deficient number, since it is larger than the sum of its proper divisors (3806378).

4006990 is a wasteful number, since it uses less digits than its factorization.

4006990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 4006990 is about 2001.7467372273. The cubic root of 4006990 is about 158.8325174988.

The spelling of 4006990 in words is "four million, six thousand, nine hundred ninety".