38644228 has 36 divisors (see below), whose sum is σ = 80161536. Its totient is φ = 15951600.

The previous prime is 38644223. The next prime is 38644231. The reversal of 38644228 is 82244683.

It is not an unprimeable number, because it can be changed into a prime (38644223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183043 + ... + 183253.

Almost surely, 2^38644228 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 38644228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40080768).

38644228 is an abundant number, since it is smaller than the sum of its proper divisors (41517308).

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

38644228 is a wasteful number, since it uses less digits than its factorization.

38644228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 251 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 38644228 is about 6216.4481820409. The cubic root of 38644228 is about 338.0867977312.

The spelling of 38644228 in words is "thirty-eight million, six hundred forty-four thousand, two hundred twenty-eight".