445523540 has 96 divisors (see below), whose sum is σ = 1170892800. Its totient is φ = 138337920.

The previous prime is 445523527. The next prime is 445523557. The reversal of 445523540 is 45325544.

It is a junction number, because it is equal to n+sod(n) for n = 445523497 and 445523506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675731 + ... + 676389.

It is an arithmetic number, because the mean of its divisors is an integer number (12196800).

Almost surely, 2^445523540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445523540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585446400).

445523540 is an abundant number, since it is smaller than the sum of its proper divisors (725369260).

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

445523540 is a wasteful number, since it uses less digits than its factorization.

445523540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

The square root of 445523540 is about 21107.4285501574. The cubic root of 445523540 is about 763.7599572081.

The spelling of 445523540 in words is "four hundred forty-five million, five hundred twenty-three thousand, five hundred forty".