38861540 has 12 divisors (see below), whose sum is σ = 81609276. Its totient is φ = 15544608.

The previous prime is 38861533. The next prime is 38861549. The reversal of 38861540 is 4516883.

38861540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 25786084 = 3616^2 + 5078^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38861540.

It is not an unprimeable number, because it can be changed into a prime (38861549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 971519 + ... + 971558.

It is an arithmetic number, because the mean of its divisors is an integer number (6800773).

Almost surely, 2^38861540 is an apocalyptic number.

It is an amenable number.

38861540 is an abundant number, since it is smaller than the sum of its proper divisors (42747736).

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

38861540 is a wasteful number, since it uses less digits than its factorization.

38861540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943086 (or 1943084 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 38861540 is about 6233.9024695611. The cubic root of 38861540 is about 338.7193460912.

The spelling of 38861540 in words is "thirty-eight million, eight hundred sixty-one thousand, five hundred forty".