42889449 has 8 divisors (see below), whose sum is σ = 57241600. Its totient is φ = 28565136.

The previous prime is 42889439. The next prime is 42889459. The reversal of 42889449 is 94498824.

42889449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42889439) and next prime (42889459).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42889449 - 2⁴ = 42889433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42889398 and 42889407.

It is not an unprimeable number, because it can be changed into a prime (42889439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3049 + ... + 9750.

It is an arithmetic number, because the mean of its divisors is an integer number (7155200).

Almost surely, 2^42889449 is an apocalyptic number.

It is an amenable number.

42889449 is a deficient number, since it is larger than the sum of its proper divisors (14352151).

42889449 is a wasteful number, since it uses less digits than its factorization.

42889449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13919.

The product of its digits is 663552, while the sum is 48.

The square root of 42889449 is about 6549.0036646806. The cubic root of 42889449 is about 350.0393125910.

Subtracting from 42889449 its sum of digits (48), we obtain a square (42889401 = 6549²).

The spelling of 42889449 in words is "forty-two million, eight hundred eighty-nine thousand, four hundred forty-nine".