5821640 has 64 divisors (see below), whose sum is σ = 14541120. Its totient is φ = 2080000.

The previous prime is 5821639. The next prime is 5821643. The reversal of 5821640 is 461285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44375 + ... + 44505.

It is an arithmetic number, because the mean of its divisors is an integer number (227205).

Almost surely, 2^5821640 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 5821640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7270560).

5821640 is an abundant number, since it is smaller than the sum of its proper divisors (8719480).

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

5821640 is a wasteful number, since it uses less digits than its factorization.

5821640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 5821640 is about 2412.8074933571. The cubic root of 5821640 is about 179.8933524631.

It can be divided in two parts, 582 and 1640, that added together give a palindrome (2222).

The spelling of 5821640 in words is "five million, eight hundred twenty-one thousand, six hundred forty".