2291004 has 36 divisors (see below), whose sum is σ = 6008184. Its totient is φ = 763344.

The previous prime is 2290999. The next prime is 2291017. The reversal of 2291004 is 4001922.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (166894).

2^2291004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2291004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3004092).

2291004 is an abundant number, since it is smaller than the sum of its proper divisors (3717180).

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

2291004 is a wasteful number, since it uses less digits than its factorization.

2291004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2291004 is about 1513.6062896275. The cubic root of 2291004 is about 131.8282891252.

Adding to 2291004 its reverse (4001922), we get a palindrome (6292926).

The spelling of 2291004 in words is "two million, two hundred ninety-one thousand, four".