38681388 has 60 divisors (see below), whose sum is σ = 101721312. Its totient is φ = 12817440.

The previous prime is 38681371. The next prime is 38681399. The reversal of 38681388 is 88318683.

38681388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 89533 + ... + 89963.

Almost surely, 2^38681388 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 38681388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50860656).

38681388 is an abundant number, since it is smaller than the sum of its proper divisors (63039924).

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

38681388 is a wasteful number, since it uses less digits than its factorization.

38681388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 713 counting only the distinct ones).

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

The square root of 38681388 is about 6219.4363088627. The cubic root of 38681388 is about 338.1951302583.

The spelling of 38681388 in words is "thirty-eight million, six hundred eighty-one thousand, three hundred eighty-eight".