2291736 has 64 divisors (see below), whose sum is σ = 6259680. Its totient is φ = 696320.

The previous prime is 2291717. The next prime is 2291747. The reversal of 2291736 is 6371922.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 2²¹ + 9² + 1 + 7⁵ + 3¹¹ + 6² .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16660 + ... + 16796.

2^2291736 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 2291736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3129840).

2291736 is an abundant number, since it is smaller than the sum of its proper divisors (3967944).

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

2291736 is a wasteful number, since it uses less digits than its factorization.

2291736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 200 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 2291736 is about 1513.8480769219. The cubic root of 2291736 is about 131.8423278075.

The spelling of 2291736 in words is "two million, two hundred ninety-one thousand, seven hundred thirty-six".