38211728 has 20 divisors (see below), whose sum is σ = 75433788. Its totient is φ = 18744960.

The previous prime is 38211727. The next prime is 38211731. The reversal of 38211728 is 82711283.

It can be written as a sum of positive squares in 2 ways, for example, as 31719424 + 6492304 = 5632^2 + 2548^2 .

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38211694 and 38211703.

It is not an unprimeable number, because it can be changed into a prime (38211727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21683 + ... + 23378.

Almost surely, 2^38211728 is an apocalyptic number.

It is an amenable number.

38211728 is a deficient number, since it is larger than the sum of its proper divisors (37222060).

38211728 is a wasteful number, since it uses less digits than its factorization.

38211728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45122 (or 45116 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 38211728 is about 6181.5635562534. The cubic root of 38211728 is about 336.8207918738.

The spelling of 38211728 in words is "thirty-eight million, two hundred eleven thousand, seven hundred twenty-eight".