38563728 has 40 divisors (see below), whose sum is σ = 113855808. Its totient is φ = 11018112.

The previous prime is 38563727. The next prime is 38563729. The reversal of 38563728 is 82736583.

It is an interprime number because it is at equal distance from previous prime (38563727) and next prime (38563729).

It is a super-2 number, since 2×38563728² = 2974322234515968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 38563728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38563727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57051 + ... + 57722.

Almost surely, 2^38563728 is an apocalyptic number.

It is an amenable number.

38563728 is an abundant number, since it is smaller than the sum of its proper divisors (75292080).

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

38563728 is a wasteful number, since it uses less digits than its factorization.

38563728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114791 (or 114785 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 38563728 is about 6209.9700482369. The cubic root of 38563728 is about 337.8518777233.

The spelling of 38563728 in words is "thirty-eight million, five hundred sixty-three thousand, seven hundred twenty-eight".