38287728 has 100 divisors (see below), whose sum is σ = 114510528. Its totient is φ = 12337920.

The previous prime is 38287721. The next prime is 38287729. The reversal of 38287728 is 82778283.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38287721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39700 + ... + 40652.

Almost surely, 2^38287728 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 38287728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57255264).

38287728 is an abundant number, since it is smaller than the sum of its proper divisors (76222800).

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

38287728 is a wasteful number, since it uses less digits than its factorization.

38287728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 989 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 38287728 is about 6187.7078146920. The cubic root of 38287728 is about 337.0439469906.

The spelling of 38287728 in words is "thirty-eight million, two hundred eighty-seven thousand, seven hundred twenty-eight".