38447444 has 48 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 15631968.

The previous prime is 38447441. The next prime is 38447447. The reversal of 38447444 is 44474483.

It is an interprime number because it is at equal distance from previous prime (38447441) and next prime (38447447).

It is a Smith number, since the sum of its digits (38) 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 = 38447398 and 38447407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38447441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146057 + ... + 146319.

It is an arithmetic number, because the mean of its divisors is an integer number (1685376).

Almost surely, 2^38447444 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 38447444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024).

38447444 is an abundant number, since it is smaller than the sum of its proper divisors (42450604).

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

38447444 is a wasteful number, since it uses less digits than its factorization.

38447444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 522 counting only the distinct ones).

The product of its digits is 172032, while the sum is 38.

The square root of 38447444 is about 6200.6002935200. The cubic root of 38447444 is about 337.5119527546.

The spelling of 38447444 in words is "thirty-eight million, four hundred forty-seven thousand, four hundred forty-four".