5038138644 has 72 divisors (see below), whose sum is σ = 14918143968. Its totient is φ = 1308605760.

The previous prime is 5038138643. The next prime is 5038138663. The reversal of 5038138644 is 4468318305.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 5038138596 and 5038138605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5038138643) 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, 382999 + ... + 395934.

It is an arithmetic number, because the mean of its divisors is an integer number (207196444).

Almost surely, 2^5038138644 is an apocalyptic number.

It is an amenable number.

5038138644 is an abundant number, since it is smaller than the sum of its proper divisors (9880005324).

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

5038138644 is a wasteful number, since it uses less digits than its factorization.

5038138644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778965 (or 778956 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 5038138644 is about 70979.8467453967. The cubic root of 5038138644 is about 1714.3126830718.

The spelling of 5038138644 in words is "five billion, thirty-eight million, one hundred thirty-eight thousand, six hundred forty-four".