445188889 has 8 divisors (see below), whose sum is σ = 460928520. Its totient is φ = 429475200.

The previous prime is 445188883. The next prime is 445188901. The reversal of 445188889 is 988881544.

It can be written as a sum of positive squares in 4 ways, for example, as 69139225 + 376049664 = 8315^2 + 19392^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 445188889 - 2³ = 445188881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445188881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32499 + ... + 44119.

It is an arithmetic number, because the mean of its divisors is an integer number (57616065).

Almost surely, 2^445188889 is an apocalyptic number.

It is an amenable number.

445188889 is a deficient number, since it is larger than the sum of its proper divisors (15739631).

445188889 is a wasteful number, since it uses less digits than its factorization.

445188889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971.

The product of its digits is 2949120, while the sum is 55.

The square root of 445188889 is about 21099.4997334060. The cubic root of 445188889 is about 763.5686788335.

The spelling of 445188889 in words is "four hundred forty-five million, one hundred eighty-eight thousand, eight hundred eighty-nine".