38188728 has 48 divisors (see below), whose sum is σ = 104415480. Its totient is φ = 12608064.

The previous prime is 38188723. The next prime is 38188729. The reversal of 38188728 is 82788183.

It is a happy number.

38188728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38188723) 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, 5226 + ... + 10182.

Almost surely, 2^38188728 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 38188728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52207740).

38188728 is an abundant number, since it is smaller than the sum of its proper divisors (66226752).

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

38188728 is a wasteful number, since it uses less digits than its factorization.

38188728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076 (or 5069 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 38188728 is about 6179.7029054802. The cubic root of 38188728 is about 336.7531997718.

The spelling of 38188728 in words is "thirty-eight million, one hundred eighty-eight thousand, seven hundred twenty-eight".