1008638449 has 16 divisors (see below), whose sum is σ = 1243833472. Its totient is φ = 796480128.

The previous prime is 1008638387. The next prime is 1008638459. The reversal of 1008638449 is 9448368001.

It is a cyclic number.

It is not a de Polignac number, because 1008638449 - 2⁷ = 1008638321 is a prime.

It is a super-2 number, since 2×1008638449² = 2034703041602251202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1008638459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36997 + ... + 58189.

It is an arithmetic number, because the mean of its divisors is an integer number (77739592).

Almost surely, 2^1008638449 is an apocalyptic number.

It is an amenable number.

1008638449 is a deficient number, since it is larger than the sum of its proper divisors (235195023).

1008638449 is a wasteful number, since it uses less digits than its factorization.

1008638449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21736.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1008638449 is about 31759.0687678339. The cubic root of 1008638449 is about 1002.8712311416.

The spelling of 1008638449 in words is "one billion, eight million, six hundred thirty-eight thousand, four hundred forty-nine".