2291590 has 32 divisors (see below), whose sum is σ = 4965120. Its totient is φ = 743904.

The previous prime is 2291581. The next prime is 2291591. The reversal of 2291590 is 951922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291591) 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, 469 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (155160).

2^2291590 is an apocalyptic number.

2291590 is an abundant number, since it is smaller than the sum of its proper divisors (2673530).

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

2291590 is a wasteful number, since it uses less digits than its factorization.

2291590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2291590 is about 1513.7998546704. The cubic root of 2291590 is about 131.8395279811.

It can be divided in two parts, 22915 and 90, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 2291590 in words is "two million, two hundred ninety-one thousand, five hundred ninety".