2243690 has 16 divisors (see below), whose sum is σ = 4085640. Its totient is φ = 887040.

The previous prime is 2243669. The next prime is 2243693. The reversal of 2243690 is 963422.

It can be written as a sum of positive squares in 4 ways, for example, as 638401 + 1605289 = 799^2 + 1267^2 .

It is a super-2 number, since 2×2243690² = 10068289632200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 2150.

2^2243690 is an apocalyptic number.

2243690 is a deficient number, since it is larger than the sum of its proper divisors (1841950).

2243690 is a wasteful number, since it uses less digits than its factorization.

2243690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 2243690 is about 1497.8951899248. The cubic root of 2243690 is about 130.9144596271.

The spelling of 2243690 in words is "two million, two hundred forty-three thousand, six hundred ninety".