38889449 has 2 divisors, whose sum is σ = 38889450. Its totient is φ = 38889448.

The previous prime is 38889427. The next prime is 38889491. The reversal of 38889449 is 94498883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36517849 + 2371600 = 6043^2 + 1540^2 .

It is an emirp because it is prime and its reverse (94498883) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38889449 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38889449.

It is not a weakly prime, because it can be changed into another prime (38889349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19444724 + 19444725.

It is an arithmetic number, because the mean of its divisors is an integer number (19444725).

Almost surely, 2^38889449 is an apocalyptic number.

It is an amenable number.

38889449 is a deficient number, since it is larger than the sum of its proper divisors (1).

38889449 is an equidigital number, since it uses as much as digits as its factorization.

38889449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 53.

The square root of 38889449 is about 6236.1405532589. The cubic root of 38889449 is about 338.8004121540.

The spelling of 38889449 in words is "thirty-eight million, eight hundred eighty-nine thousand, four hundred forty-nine".