2158090 has 32 divisors (see below), whose sum is σ = 4427136. Its totient is φ = 749760.

The previous prime is 2158087. The next prime is 2158097. The reversal of 2158090 is 908512.

It is not an unprimeable number, because it can be changed into a prime (2158097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2104 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (138348).

2^2158090 is an apocalyptic number.

2158090 is an abundant number, since it is smaller than the sum of its proper divisors (2269046).

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

2158090 is a wasteful number, since it uses less digits than its factorization.

2158090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2158090 is about 1469.0439067639. The cubic root of 2158090 is about 129.2279685894.

The spelling of 2158090 in words is "two million, one hundred fifty-eight thousand, ninety".