5621940 has 96 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 1443456.

The previous prime is 5621939. The next prime is 5621953. The reversal of 5621940 is 491265.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 7.

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 31 ways as a sum of consecutive naturals, for example, 15481 + ... + 15839.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

Almost surely, 2^5621940 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 5621940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9072000).

5621940 is an abundant number, since it is smaller than the sum of its proper divisors (12522060).

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

5621940 is a wasteful number, since it uses less digits than its factorization.

5621940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 5621940 is about 2371.0630527255. The cubic root of 5621940 is about 177.8124102089.

It can be divided in two parts, 5621 and 940, that added together give a 8-th power (6561 = 3⁸).

The spelling of 5621940 in words is "five million, six hundred twenty-one thousand, nine hundred forty".