2158490 has 16 divisors (see below), whose sum is σ = 4114152. Its totient is φ = 812544.

The previous prime is 2158483. The next prime is 2158501. The reversal of 2158490 is 948512.

It can be written as a sum of positive squares in 4 ways, for example, as 1708249 + 450241 = 1307^2 + 671^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6179 + ... + 6518.

2^2158490 is an apocalyptic number.

2158490 is a deficient number, since it is larger than the sum of its proper divisors (1955662).

2158490 is a wasteful number, since it uses less digits than its factorization.

2158490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12721.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2158490 is about 1469.1800434256. The cubic root of 2158490 is about 129.2359521913.

The spelling of 2158490 in words is "two million, one hundred fifty-eight thousand, four hundred ninety".