5621784 has 64 divisors (see below), whose sum is σ = 16262400. Its totient is φ = 1586304.

The previous prime is 5621779. The next prime is 5621809. The reversal of 5621784 is 4871265.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18159 + ... + 18465.

It is an arithmetic number, because the mean of its divisors is an integer number (254100).

Almost surely, 2^5621784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5621784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8131200).

5621784 is an abundant number, since it is smaller than the sum of its proper divisors (10640616).

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

5621784 is a wasteful number, since it uses less digits than its factorization.

5621784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 428 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 5621784 is about 2371.0301558605. The cubic root of 5621784 is about 177.8107655221.

It can be divided in two parts, 562 and 1784, that added together give a triangular number (2346 = T₆₈).

The spelling of 5621784 in words is "five million, six hundred twenty-one thousand, seven hundred eighty-four".