38678449 has 2 divisors, whose sum is σ = 38678450. Its totient is φ = 38678448.

The previous prime is 38678447. The next prime is 38678477. The reversal of 38678449 is 94487683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 13927824 = 4975^2 + 3732^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678449 - 2¹ = 38678447 is a prime.

Together with 38678447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38678441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339224 + 19339225.

It is an arithmetic number, because the mean of its divisors is an integer number (19339225).

Almost surely, 2^38678449 is an apocalyptic number.

It is an amenable number.

38678449 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678449 is an equidigital number, since it uses as much as digits as its factorization.

38678449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 38678449 is about 6219.2000289426. The cubic root of 38678449 is about 338.1865647206.

The spelling of 38678449 in words is "thirty-eight million, six hundred seventy-eight thousand, four hundred forty-nine".