38618540 has 12 divisors (see below), whose sum is σ = 81098976. Its totient is φ = 15447408.

The previous prime is 38618539. The next prime is 38618549. The reversal of 38618540 is 4581683.

38618540 is nontrivially palindromic in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 38618540.

It is not an unprimeable number, because it can be changed into a prime (38618549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965444 + ... + 965483.

It is an arithmetic number, because the mean of its divisors is an integer number (6758248).

Almost surely, 2^38618540 is an apocalyptic number.

It is an amenable number.

38618540 is an abundant number, since it is smaller than the sum of its proper divisors (42480436).

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

38618540 is a wasteful number, since it uses less digits than its factorization.

38618540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930936 (or 1930934 counting only the distinct ones).

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

The square root of 38618540 is about 6214.3817069762. The cubic root of 38618540 is about 338.0118689155.

The spelling of 38618540 in words is "thirty-eight million, six hundred eighteen thousand, five hundred forty".