445645320 has 128 divisors (see below), whose sum is σ = 1401408000. Its totient is φ = 113218560.

The previous prime is 445645297. The next prime is 445645337. The reversal of 445645320 is 23546544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274110 + ... + 275730.

It is an arithmetic number, because the mean of its divisors is an integer number (10948500).

Almost surely, 2^445645320 is an apocalyptic number.

445645320 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 445645320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700704000).

445645320 is an abundant number, since it is smaller than the sum of its proper divisors (955762680).

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

445645320 is a wasteful number, since it uses less digits than its factorization.

445645320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 445645320 is about 21110.3131194210. The cubic root of 445645320 is about 763.8295399244.

The spelling of 445645320 in words is "four hundred forty-five million, six hundred forty-five thousand, three hundred twenty".