2558790 has 80 divisors (see below), whose sum is σ = 7440048. Its totient is φ = 629856.

The previous prime is 2558783. The next prime is 2558791. The reversal of 2558790 is 978552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558791) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 196824 + ... + 196836.

2^2558790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2558790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3720024).

2558790 is an abundant number, since it is smaller than the sum of its proper divisors (4881258).

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

2558790 is an frugal number, since it uses more digits than its factorization.

2558790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 2558790 is about 1599.6218303087. The cubic root of 2558790 is about 136.7765195157.

It can be divided in two parts, 255 and 8790, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 2558790 in words is "two million, five hundred fifty-eight thousand, seven hundred ninety".