5691840 has 252 divisors, whose sum is σ = 23106888. Its totient is φ = 1182720.

The previous prime is 5691827. The next prime is 5691869. The reversal of 5691840 is 481965.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 517435 + ... + 517445.

It is an arithmetic number, because the mean of its divisors is an integer number (91694).

Almost surely, 2^5691840 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 5691840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11553444).

5691840 is an abundant number, since it is smaller than the sum of its proper divisors (17415048).

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

5691840 is a wasteful number, since it uses less digits than its factorization.

5691840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 5691840 is about 2385.7577412638. The cubic root of 5691840 is about 178.5463163163.

Multiplying 5691840 by its product of nonzero digits (8640), we get a square (49177497600 = 221760²).

The spelling of 5691840 in words is "five million, six hundred ninety-one thousand, eight hundred forty".