5438780640 has 360 divisors, whose sum is σ = 19918899000. Its totient is φ = 1397523456.

The previous prime is 5438780623. The next prime is 5438780681. The reversal of 5438780640 is 460878345.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 10899111 + ... + 10899609.

It is an arithmetic number, because the mean of its divisors is an integer number (55330275).

Almost surely, 2^5438780640 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 5438780640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9959449500).

5438780640 is an abundant number, since it is smaller than the sum of its proper divisors (14480118360).

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

5438780640 is a wasteful number, since it uses less digits than its factorization.

5438780640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 5438780640 is about 73748.0890599885. The cubic root of 5438780640 is about 1758.6004541855.

The spelling of 5438780640 in words is "five billion, four hundred thirty-eight million, seven hundred eighty thousand, six hundred forty".