445688685 has 24 divisors (see below), whose sum is σ = 831953304. Its totient is φ = 219415680.

The previous prime is 445688657. The next prime is 445688689. The reversal of 445688685 is 586886544.

It can be written as a sum of positive squares in 4 ways, for example, as 6953769 + 438734916 = 2637^2 + 20946^2 .

It is not a de Polignac number, because 445688685 - 2¹⁷ = 445557613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445688689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380346 + ... + 381515.

It is an arithmetic number, because the mean of its divisors is an integer number (34664721).

Almost surely, 2^445688685 is an apocalyptic number.

445688685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

445688685 is a deficient number, since it is larger than the sum of its proper divisors (386264619).

445688685 is a wasteful number, since it uses less digits than its factorization.

445688685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761885 (or 761882 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 54.

The square root of 445688685 is about 21111.3401990494. The cubic root of 445688685 is about 763.8543147787.

The spelling of 445688685 in words is "four hundred forty-five million, six hundred eighty-eight thousand, six hundred eighty-five".