38887840 has 108 divisors (see below), whose sum is σ = 101076066. Its totient is φ = 14135296.

The previous prime is 38887819. The next prime is 38887843. The reversal of 38887840 is 4878883.

It can be written as a sum of positive squares in 9 ways, for example, as 13927824 + 24960016 = 3732^2 + 4996^2 .

It is not an unprimeable number, because it can be changed into a prime (38887843) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1340946 + ... + 1340974.

Almost surely, 2^38887840 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 38887840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50538033).

38887840 is an abundant number, since it is smaller than the sum of its proper divisors (62188226).

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

38887840 is a wasteful number, since it uses less digits than its factorization.

38887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 38887840 is about 6236.0115458520. The cubic root of 38887840 is about 338.7957396152.

The spelling of 38887840 in words is "thirty-eight million, eight hundred eighty-seven thousand, eight hundred forty".