38724435438 has 128 divisors (see below), whose sum is σ = 89311444992. Its totient is φ = 11100329856.

The previous prime is 38724435427. The next prime is 38724435457. The reversal of 38724435438 is 83453442783.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46824781 + ... + 46825607.

It is an arithmetic number, because the mean of its divisors is an integer number (697745664).

Almost surely, 2^38724435438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38724435438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44655722496).

38724435438 is an abundant number, since it is smaller than the sum of its proper divisors (50587009554).

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

38724435438 is a wasteful number, since it uses less digits than its factorization.

38724435438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518.

The product of its digits is 7741440, while the sum is 51.

The spelling of 38724435438 in words is "thirty-eight billion, seven hundred twenty-four million, four hundred thirty-five thousand, four hundred thirty-eight".