38648449 has 4 divisors (see below), whose sum is σ = 44169664. Its totient is φ = 33127236.

The previous prime is 38648437. The next prime is 38648471. The reversal of 38648449 is 94484683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38648449 - 2⁵ = 38648417 is a prime.

It is a super-2 number, since 2×38648449² = 2987405220211202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38648399 and 38648408.

It is not an unprimeable number, because it can be changed into a prime (38648419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2760597 + ... + 2760610.

It is an arithmetic number, because the mean of its divisors is an integer number (11042416).

Almost surely, 2^38648449 is an apocalyptic number.

It is an amenable number.

38648449 is a deficient number, since it is larger than the sum of its proper divisors (5521215).

38648449 is an equidigital number, since it uses as much as digits as its factorization.

38648449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521214.

The product of its digits is 663552, while the sum is 46.

The square root of 38648449 is about 6216.7876753191. The cubic root of 38648449 is about 338.0991067055.

The spelling of 38648449 in words is "thirty-eight million, six hundred forty-eight thousand, four hundred forty-nine".