38919144 has 64 divisors (see below), whose sum is σ = 111744000. Its totient is φ = 11171520.

The previous prime is 38919143. The next prime is 38919157. The reversal of 38919144 is 44191983.

It is not an unprimeable number, because it can be changed into a prime (38919143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137 + ... + 8895.

It is an arithmetic number, because the mean of its divisors is an integer number (1746000).

Almost surely, 2^38919144 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 38919144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55872000).

38919144 is an abundant number, since it is smaller than the sum of its proper divisors (72824856).

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

38919144 is a wasteful number, since it uses less digits than its factorization.

38919144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798 (or 7794 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 38919144 is about 6238.5209785654. The cubic root of 38919144 is about 338.8866233577.

The spelling of 38919144 in words is "thirty-eight million, nine hundred nineteen thousand, one hundred forty-four".