2147844 has 12 divisors (see below), whose sum is σ = 5011664. Its totient is φ = 715944.

The previous prime is 2147843. The next prime is 2147861. The reversal of 2147844 is 4487412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2147844² = 9226467696672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2147843) 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, 89482 + ... + 89505.

2^2147844 is an apocalyptic number.

It is an amenable number.

2147844 is an abundant number, since it is smaller than the sum of its proper divisors (2863820).

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

2147844 is a wasteful number, since it uses less digits than its factorization.

2147844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178994 (or 178992 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 2147844 is about 1465.5524555607. The cubic root of 2147844 is about 129.0231314808.

The spelling of 2147844 in words is "two million, one hundred forty-seven thousand, eight hundred forty-four".