42445889 has 8 divisors (see below), whose sum is σ = 45214848. Its totient is φ = 39707200.

The previous prime is 42445861. The next prime is 42445891. The reversal of 42445889 is 98854424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42445889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42445289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4637 + ... + 10314.

It is an arithmetic number, because the mean of its divisors is an integer number (5651856).

Almost surely, 2^42445889 is an apocalyptic number.

It is an amenable number.

42445889 is a deficient number, since it is larger than the sum of its proper divisors (2768959).

42445889 is a wasteful number, since it uses less digits than its factorization.

42445889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15135.

The product of its digits is 368640, while the sum is 44.

The square root of 42445889 is about 6515.0509591253. The cubic root of 42445889 is about 348.8284337749.

It can be divided in two parts, 42445 and 889, that added together give a palindrome (43334).

The spelling of 42445889 in words is "forty-two million, four hundred forty-five thousand, eight hundred eighty-nine".