38681784 has 48 divisors (see below), whose sum is σ = 105763320. Its totient is φ = 12770880.

The previous prime is 38681779. The next prime is 38681789. The reversal of 38681784 is 48718683.

38681784 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 (38681779) and next prime (38681789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38681789) 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 11 ways as a sum of consecutive naturals, for example, 5194 + ... + 10214.

Almost surely, 2^38681784 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 38681784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52881660).

38681784 is an abundant number, since it is smaller than the sum of its proper divisors (67081536).

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

38681784 is a wasteful number, since it uses less digits than its factorization.

38681784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140 (or 5133 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 38681784 is about 6219.4681444638. The cubic root of 38681784 is about 338.1962843432.

The spelling of 38681784 in words is "thirty-eight million, six hundred eighty-one thousand, seven hundred eighty-four".