445039686 has 96 divisors (see below), whose sum is σ = 1199435328. Its totient is φ = 116121600.

The previous prime is 445039681. The next prime is 445039687. The reversal of 445039686 is 686930544.

It is a super-2 number, since 2×445039686² = 396120644229957192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445039681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157486 + ... + 160286.

It is an arithmetic number, because the mean of its divisors is an integer number (12494118).

Almost surely, 2^445039686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445039686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599717664).

445039686 is an abundant number, since it is smaller than the sum of its proper divisors (754395642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445039686 is a wasteful number, since it uses less digits than its factorization.

445039686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 445039686 is about 21095.9637371702. The cubic root of 445039686 is about 763.4833671302.

The spelling of 445039686 in words is "four hundred forty-five million, thirty-nine thousand, six hundred eighty-six".