2180890 has 12 divisors (see below), whose sum is σ = 3934026. Its totient is φ = 870488.

The previous prime is 2180873. The next prime is 2180911. The reversal of 2180890 is 980812.

It can be written as a sum of positive squares in only one way, i.e., 1962801 + 218089 = 1401^2 + 467^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4437 + ... + 4903.

2^2180890 is an apocalyptic number.

2180890 is a deficient number, since it is larger than the sum of its proper divisors (1753136).

2180890 is an frugal number, since it uses more digits than its factorization.

2180890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 2180890 is about 1476.7836672986. The cubic root of 2180890 is about 129.6814686797.

The spelling of 2180890 in words is "two million, one hundred eighty thousand, eight hundred ninety".