4090990 has 8 divisors (see below), whose sum is σ = 7363800. Its totient is φ = 1636392.

The previous prime is 4090973. The next prime is 4090991. The reversal of 4090990 is 990904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204540 + ... + 204559.

It is an arithmetic number, because the mean of its divisors is an integer number (920475).

Almost surely, 2^4090990 is an apocalyptic number.

4090990 is a deficient number, since it is larger than the sum of its proper divisors (3272810).

4090990 is a wasteful number, since it uses less digits than its factorization.

4090990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409106.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 4090990 is about 2022.6195885534. The cubic root of 4090990 is about 159.9347390099.

The spelling of 4090990 in words is "four million, ninety thousand, nine hundred ninety".