2281686 has 32 divisors (see below), whose sum is σ = 5031936. Its totient is φ = 684000.

The previous prime is 2281673. The next prime is 2281687. The reversal of 2281686 is 6861822.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281687) 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, 11851 + ... + 12041.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^2281686 is an apocalyptic number.

2281686 is an abundant number, since it is smaller than the sum of its proper divisors (2750250).

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

2281686 is a wasteful number, since it uses less digits than its factorization.

2281686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its digits is 9216, while the sum is 33.

The square root of 2281686 is about 1510.5250742705. The cubic root of 2281686 is about 131.6493217195.

The spelling of 2281686 in words is "two million, two hundred eighty-one thousand, six hundred eighty-six".