5671644 has 24 divisors (see below), whose sum is σ = 14437248. Its totient is φ = 1718640.

The previous prime is 5671621. The next prime is 5671649. The reversal of 5671644 is 4461765.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5671649) 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, 21352 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (601552).

Almost surely, 2^5671644 is an apocalyptic number.

It is an amenable number.

5671644 is an abundant number, since it is smaller than the sum of its proper divisors (8765604).

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

5671644 is a wasteful number, since it uses less digits than its factorization.

5671644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42985 (or 42983 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 5671644 is about 2381.5213624908. The cubic root of 5671644 is about 178.3348911462.

It can be divided in two parts, 567 and 1644, that added together give a triangular number (2211 = T₆₆).

The spelling of 5671644 in words is "five million, six hundred seventy-one thousand, six hundred forty-four".