38887220 has 12 divisors (see below), whose sum is σ = 81663204. Its totient is φ = 15554880.

The previous prime is 38887217. The next prime is 38887223. The reversal of 38887220 is 2278883.

38887220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (38887217) and next prime (38887223).

It can be written as a sum of positive squares in 2 ways, for example, as 22791076 + 16096144 = 4774^2 + 4012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38887223) 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, 972161 + ... + 972200.

It is an arithmetic number, because the mean of its divisors is an integer number (6805267).

Almost surely, 2^38887220 is an apocalyptic number.

It is an amenable number.

38887220 is an abundant number, since it is smaller than the sum of its proper divisors (42775984).

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

38887220 is a wasteful number, since it uses less digits than its factorization.

38887220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944370 (or 1944368 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 38887220 is about 6235.9618343925. The cubic root of 38887220 is about 338.7939390997.

The spelling of 38887220 in words is "thirty-eight million, eight hundred eighty-seven thousand, two hundred twenty".