2195890 has 16 divisors (see below), whose sum is σ = 4185432. Its totient is φ = 826624.

The previous prime is 2195867. The next prime is 2195891. The reversal of 2195890 is 985912.

It can be written as a sum of positive squares in 4 ways, for example, as 2013561 + 182329 = 1419^2 + 427^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (2195891) 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, 6289 + ... + 6628.

2^2195890 is an apocalyptic number.

2195890 is a deficient number, since it is larger than the sum of its proper divisors (1989542).

2195890 is a wasteful number, since it uses less digits than its factorization.

2195890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 2195890 is about 1481.8535690142. The cubic root of 2195890 is about 129.9781028207.

The spelling of 2195890 in words is "two million, one hundred ninety-five thousand, eight hundred ninety".