5240938644 has 72 divisors (see below), whose sum is σ = 14068803840. Its totient is φ = 1640362752.

The previous prime is 5240938643. The next prime is 5240938657. The reversal of 5240938644 is 4468390425.

5240938644 is a `hidden beast` number, since 524 + 0 + 9 + 3 + 86 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 5240938644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5240938643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43389 + ... + 111195.

Almost surely, 2^5240938644 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 5240938644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7034401920).

5240938644 is an abundant number, since it is smaller than the sum of its proper divisors (8827865196).

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

5240938644 is a wasteful number, since it uses less digits than its factorization.

5240938644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67949 (or 67944 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 5240938644 is about 72394.3274297096. The cubic root of 5240938644 is about 1737.0128255044.

The spelling of 5240938644 in words is "five billion, two hundred forty million, nine hundred thirty-eight thousand, six hundred forty-four".