2591890 has 32 divisors (see below), whose sum is σ = 5428224. Its totient is φ = 872640.

The previous prime is 2591857. The next prime is 2591891. The reversal of 2591890 is 981952.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2591891) 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, 3967 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (169632).

2^2591890 is an apocalyptic number.

2591890 is an abundant number, since it is smaller than the sum of its proper divisors (2836334).

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

2591890 is a wasteful number, since it uses less digits than its factorization.

2591890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

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

The square root of 2591890 is about 1609.9347812877. The cubic root of 2591890 is about 137.3637658912.

It can be divided in two parts, 2591 and 890, that added together give a square (3481 = 59²).

The spelling of 2591890 in words is "two million, five hundred ninety-one thousand, eight hundred ninety".