4009806 has 24 divisors (see below), whose sum is σ = 8789040. Its totient is φ = 1321056.

The previous prime is 4009799. The next prime is 4009823. The reversal of 4009806 is 6089004.

It is a self number, because there is not a number n which added to its sum of digits gives 4009806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (366210).

Almost surely, 2^4009806 is an apocalyptic number.

4009806 is an abundant number, since it is smaller than the sum of its proper divisors (4779234).

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

4009806 is a wasteful number, since it uses less digits than its factorization.

4009806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600 (or 2597 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 4009806 is about 2002.4499993758. The cubic root of 4009806 is about 158.8697164631.

The spelling of 4009806 in words is "four million, nine thousand, eight hundred six".