2209990 has 16 divisors (see below), whose sum is σ = 4106880. Its totient is φ = 855360.

The previous prime is 2209979. The next prime is 2209993. The reversal of 2209990 is 999022.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3255 + ... + 3874.

It is an arithmetic number, because the mean of its divisors is an integer number (256680).

2^2209990 is an apocalyptic number.

2209990 is a deficient number, since it is larger than the sum of its proper divisors (1896890).

2209990 is a wasteful number, since it uses less digits than its factorization.

2209990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167.

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

The square root of 2209990 is about 1486.6035113641. The cubic root of 2209990 is about 130.2557097075.

The spelling of 2209990 in words is "two million, two hundred nine thousand, nine hundred ninety".