445938869 has 4 divisors (see below), whose sum is σ = 446371596. Its totient is φ = 445506144.

The previous prime is 445938863. The next prime is 445938877. The reversal of 445938869 is 968839544.

It is a happy number.

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 397803025 + 48135844 = 19945^2 + 6938^2 .

It is a cyclic number.

It is not a de Polignac number, because 445938869 - 2¹² = 445934773 is a prime.

It is a super-2 number, since 2×445938869² = 397722949769998322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445938863) 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, 214814 + ... + 216879.

It is an arithmetic number, because the mean of its divisors is an integer number (111592899).

Almost surely, 2^445938869 is an apocalyptic number.

It is an amenable number.

445938869 is a deficient number, since it is larger than the sum of its proper divisors (432727).

445938869 is a wasteful number, since it uses less digits than its factorization.

445938869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432726.

The product of its digits is 7464960, while the sum is 56.

The square root of 445938869 is about 21117.2647139728. The cubic root of 445938869 is about 763.9972160064.

The spelling of 445938869 in words is "four hundred forty-five million, nine hundred thirty-eight thousand, eight hundred sixty-nine".