38381886 has 48 divisors (see below), whose sum is σ = 90131184. Its totient is φ = 11757312.

The previous prime is 38381851. The next prime is 38381887. The reversal of 38381886 is 68818383.

38381886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38381887) 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 23 ways as a sum of consecutive naturals, for example, 11700 + ... + 14616.

It is an arithmetic number, because the mean of its divisors is an integer number (1877733).

Almost surely, 2^38381886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38381886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45065592).

38381886 is an abundant number, since it is smaller than the sum of its proper divisors (51749298).

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

38381886 is a wasteful number, since it uses less digits than its factorization.

38381886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985 (or 2982 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 38381886 is about 6195.3116144388. The cubic root of 38381886 is about 337.3200093769.

It can be divided in two parts, 38 and 381886, that added together give a square (381924 = 618²).

The spelling of 38381886 in words is "thirty-eight million, three hundred eighty-one thousand, eight hundred eighty-six".