2271644 has 12 divisors (see below), whose sum is σ = 4002768. Its totient is φ = 1128000.

The previous prime is 2271637. The next prime is 2271673. The reversal of 2271644 is 4461722.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277 + ... + 2484.

It is an arithmetic number, because the mean of its divisors is an integer number (333564).

2^2271644 is an apocalyptic number.

It is an amenable number.

2271644 is a deficient number, since it is larger than the sum of its proper divisors (1731124).

2271644 is a wasteful number, since it uses less digits than its factorization.

2271644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916 (or 3914 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 2271644 is about 1507.1973991485. The cubic root of 2271644 is about 131.4559023636.

The spelling of 2271644 in words is "two million, two hundred seventy-one thousand, six hundred forty-four".