2190920 has 16 divisors (see below), whose sum is σ = 4929660. Its totient is φ = 876352.

The previous prime is 2190901. The next prime is 2190959. The reversal of 2190920 is 290912.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 111556 = 1442^2 + 334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27347 + ... + 27426.

2^2190920 is an apocalyptic number.

2190920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190920 is an abundant number, since it is smaller than the sum of its proper divisors (2738740).

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

2190920 is a wasteful number, since it uses less digits than its factorization.

2190920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54784 (or 54780 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2190920 is about 1480.1756652506. The cubic root of 2190920 is about 129.8799681014.

The spelling of 2190920 in words is "two million, one hundred ninety thousand, nine hundred twenty".