2281690 has 16 divisors (see below), whose sum is σ = 4124520. Its totient is φ = 908800.

The previous prime is 2281687. The next prime is 2281711. The reversal of 2281690 is 961822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2076481 + 205209 = 1441^2 + 453^2 .

It is a super-2 number, since 2×2281690² = 10412218512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3726 + ... + 4294.

2^2281690 is an apocalyptic number.

2281690 is a deficient number, since it is larger than the sum of its proper divisors (1842830).

2281690 is a wasteful number, since it uses less digits than its factorization.

2281690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2281690 is about 1510.5263983129. The cubic root of 2281690 is about 131.6493986505.

The spelling of 2281690 in words is "two million, two hundred eighty-one thousand, six hundred ninety".