4099890 has 32 divisors (see below), whose sum is σ = 10419840. Its totient is φ = 1028864.

The previous prime is 4099889. The next prime is 4099897. The reversal of 4099890 is 989904.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099897) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3510 + ... + 4529.

It is an arithmetic number, because the mean of its divisors is an integer number (325620).

Almost surely, 2^4099890 is an apocalyptic number.

4099890 is an abundant number, since it is smaller than the sum of its proper divisors (6319950).

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

4099890 is a wasteful number, since it uses less digits than its factorization.

4099890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8066.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 4099890 is about 2024.8185103856. The cubic root of 4099890 is about 160.0506350156.

The spelling of 4099890 in words is "four million, ninety-nine thousand, eight hundred ninety".