5244447640 has 64 divisors (see below), whose sum is σ = 13151743200. Its totient is φ = 1870460928.

The previous prime is 5244447617. The next prime is 5244447643. The reversal of 5244447640 is 467444425.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 5244447593 and 5244447602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5244447643) 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, 190039 + ... + 215878.

Almost surely, 2^5244447640 is an apocalyptic number.

It is an amenable number.

5244447640 is an abundant number, since it is smaller than the sum of its proper divisors (7907295560).

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

5244447640 is a wasteful number, since it uses less digits than its factorization.

5244447640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405964 (or 405960 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 40.

The square root of 5244447640 is about 72418.5586711031. The cubic root of 5244447640 is about 1737.4004031035.

The spelling of 5244447640 in words is "five billion, two hundred forty-four million, four hundred forty-seven thousand, six hundred forty".