445656889 has 4 divisors (see below), whose sum is σ = 445791780. Its totient is φ = 445522000.

The previous prime is 445656863. The next prime is 445656907. The reversal of 445656889 is 988656544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408848400 + 36808489 = 20220^2 + 6067^2 .

It is a cyclic number.

It is not a de Polignac number, because 445656889 - 2¹¹ = 445654841 is a prime.

It is a super-2 number, since 2×445656889² = 397220125426316642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445656829) 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, 62362 + ... + 69139.

It is an arithmetic number, because the mean of its divisors is an integer number (111447945).

Almost surely, 2^445656889 is an apocalyptic number.

It is an amenable number.

445656889 is a deficient number, since it is larger than the sum of its proper divisors (134891).

445656889 is a wasteful number, since it uses less digits than its factorization.

445656889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134890.

The product of its digits is 8294400, while the sum is 55.

The square root of 445656889 is about 21110.5871306319. The cubic root of 445656889 is about 763.8361495660.

The spelling of 445656889 in words is "four hundred forty-five million, six hundred fifty-six thousand, eight hundred eighty-nine".