445425640 has 64 divisors (see below), whose sum is σ = 1120029120. Its totient is φ = 158016000.

The previous prime is 445425623. The next prime is 445425641. The reversal of 445425640 is 46524544.

It is a junction number, because it is equal to n+sod(n) for n = 445425596 and 445425605.

It is not an unprimeable number, because it can be changed into a prime (445425641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5695 + ... + 30385.

It is an arithmetic number, because the mean of its divisors is an integer number (17500455).

Almost surely, 2^445425640 is an apocalyptic number.

445425640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445425640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560014560).

445425640 is an abundant number, since it is smaller than the sum of its proper divisors (674603480).

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

445425640 is a wasteful number, since it uses less digits than its factorization.

445425640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24754 (or 24750 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

The square root of 445425640 is about 21105.1093339978. The cubic root of 445425640 is about 763.7040098633.

The spelling of 445425640 in words is "four hundred forty-five million, four hundred twenty-five thousand, six hundred forty".