2261646 has 48 divisors (see below), whose sum is σ = 5475600. Its totient is φ = 670464.

The previous prime is 2261639. The next prime is 2261653. The reversal of 2261646 is 6461622.

It is a happy number.

2261646 is a `hidden beast` number, since 2 + 2 + 616 + 46 = 666.

It is an interprime number because it is at equal distance from previous prime (2261639) and next prime (2261653).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5620 + ... + 6008.

It is an arithmetic number, because the mean of its divisors is an integer number (114075).

2^2261646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2261646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2737800).

2261646 is an abundant number, since it is smaller than the sum of its proper divisors (3213954).

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

2261646 is a wasteful number, since it uses less digits than its factorization.

2261646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 2261646 is about 1503.8769896504. The cubic root of 2261646 is about 131.2627633846.

The spelling of 2261646 in words is "two million, two hundred sixty-one thousand, six hundred forty-six".