38628644 has 6 divisors (see below), whose sum is σ = 67600134. Its totient is φ = 19314320.

The previous prime is 38628643. The next prime is 38628647. The reversal of 38628644 is 44682683.

It can be written as a sum of positive squares in only one way, i.e., 34668544 + 3960100 = 5888^2 + 1990^2 .

It is not an unprimeable number, because it can be changed into a prime (38628643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828577 + ... + 4828584.

It is an arithmetic number, because the mean of its divisors is an integer number (11266689).

Almost surely, 2^38628644 is an apocalyptic number.

It is an amenable number.

38628644 is a deficient number, since it is larger than the sum of its proper divisors (28971490).

38628644 is a wasteful number, since it uses less digits than its factorization.

38628644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657165 (or 9657163 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 38628644 is about 6215.1946067682. The cubic root of 38628644 is about 338.0413450351.

The spelling of 38628644 in words is "thirty-eight million, six hundred twenty-eight thousand, six hundred forty-four".