38689540 has 24 divisors (see below), whose sum is σ = 81873792. Its totient is φ = 15356640.

The previous prime is 38689499. The next prime is 38689543. The reversal of 38689540 is 4598683.

It is not an unprimeable number, because it can be changed into a prime (38689543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4764 + ... + 10003.

It is an arithmetic number, because the mean of its divisors is an integer number (3411408).

Almost surely, 2^38689540 is an apocalyptic number.

It is an amenable number.

38689540 is an abundant number, since it is smaller than the sum of its proper divisors (43184252).

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

38689540 is a wasteful number, since it uses less digits than its factorization.

38689540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907 (or 14905 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 38689540 is about 6220.0916391963. The cubic root of 38689540 is about 338.2188864987.

The spelling of 38689540 in words is "thirty-eight million, six hundred eighty-nine thousand, five hundred forty".