2147644 has 12 divisors (see below), whose sum is σ = 3979584. Its totient is φ = 1010624.

The previous prime is 2147641. The next prime is 2147657. The reversal of 2147644 is 4467412.

It is a super-2 number, since 2×2147644² = 9224749501472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15724 + ... + 15859.

It is an arithmetic number, because the mean of its divisors is an integer number (331632).

2^2147644 is an apocalyptic number.

It is an amenable number.

2147644 is a deficient number, since it is larger than the sum of its proper divisors (1831940).

2147644 is a wasteful number, since it uses less digits than its factorization.

2147644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31604 (or 31602 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 2147644 is about 1465.4842203176. The cubic root of 2147644 is about 129.0191266234.

The spelling of 2147644 in words is "two million, one hundred forty-seven thousand, six hundred forty-four".