2220990 has 32 divisors (see below), whose sum is σ = 5390496. Its totient is φ = 585600.

The previous prime is 2220979. The next prime is 2221007. The reversal of 2220990 is 990222.

It is a self number, because there is not a number n which added to its sum of digits gives 2220990.

It is a congruent number.

It is an unprimeable number.

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, 2664 + ... + 3396.

It is an arithmetic number, because the mean of its divisors is an integer number (168453).

2^2220990 is an apocalyptic number.

2220990 is an abundant number, since it is smaller than the sum of its proper divisors (3169506).

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

2220990 is a wasteful number, since it uses less digits than its factorization.

2220990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2220990 is about 1490.2986277924. The cubic root of 2220990 is about 130.4714636449.

It can be divided in two parts, 22 and 20990, that added together give a palindrome (21012).

The spelling of 2220990 in words is "two million, two hundred twenty thousand, nine hundred ninety".