38138040440 has 16 divisors (see below), whose sum is σ = 85810591080. Its totient is φ = 15255216160.

The previous prime is 38138040419. The next prime is 38138040463. The reversal of 38138040440 is 4404083183.

It is a self number, because there is not a number n which added to its sum of digits gives 38138040440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476725466 + ... + 476725545.

Almost surely, 2^38138040440 is an apocalyptic number.

It is an amenable number.

38138040440 is an abundant number, since it is smaller than the sum of its proper divisors (47672550640).

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

38138040440 is a wasteful number, since it uses less digits than its factorization.

38138040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953451022 (or 953451018 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 38138040440 in words is "thirty-eight billion, one hundred thirty-eight million, forty thousand, four hundred forty".