38791540 has 96 divisors (see below), whose sum is σ = 91929600. Its totient is φ = 13685760.

The previous prime is 38791513. The next prime is 38791541. The reversal of 38791540 is 4519783.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 38791540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38791541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435816 + ... + 435904.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^38791540 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 38791540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45964800).

38791540 is an abundant number, since it is smaller than the sum of its proper divisors (53138060).

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

38791540 is a wasteful number, since it uses less digits than its factorization.

38791540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 38791540 is about 6228.2854783640. The cubic root of 38791540 is about 338.5158492259.

The spelling of 38791540 in words is "thirty-eight million, seven hundred ninety-one thousand, five hundred forty".