5021640 has 192 divisors, whose sum is σ = 18673200. Its totient is φ = 1161216.

The previous prime is 5021633. The next prime is 5021641. The reversal of 5021640 is 461205.

It is a happy number.

5021640 is a `hidden beast` number, since 5 + 0 + 21 + 640 = 666.

5021640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2377764 + 2643876 = 1542^2 + 1626^2 .

It is a super-3 number, since 3×5021640³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (5021641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135702 + ... + 135738.

Almost surely, 2^5021640 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 5021640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9336600).

5021640 is an abundant number, since it is smaller than the sum of its proper divisors (13651560).

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

5021640 is a wasteful number, since it uses less digits than its factorization.

5021640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 5021640 is about 2240.9016042656. The cubic root of 5021640 is about 171.2439321558.

Adding to 5021640 its reverse (461205), we get a palindrome (5482845).

The spelling of 5021640 in words is "five million, twenty-one thousand, six hundred forty".