8209990 has 32 divisors (see below), whose sum is σ = 15418656. Its totient is φ = 3144960.

The previous prime is 8209973. The next prime is 8209991. The reversal of 8209990 is 999028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26074 + ... + 26386.

It is an arithmetic number, because the mean of its divisors is an integer number (481833).

Almost surely, 2^8209990 is an apocalyptic number.

8209990 is a deficient number, since it is larger than the sum of its proper divisors (7208666).

8209990 is a wasteful number, since it uses less digits than its factorization.

8209990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 8209990 is about 2865.3080113663. The cubic root of 8209990 is about 201.7348250669.

The spelling of 8209990 in words is "eight million, two hundred nine thousand, nine hundred ninety".