445185680 has 80 divisors (see below), whose sum is σ = 1059575040. Its totient is φ = 173899776.

The previous prime is 445185659. The next prime is 445185703. The reversal of 445185680 is 86581544.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212857 + ... + 1213223.

It is an arithmetic number, because the mean of its divisors is an integer number (13244688).

Almost surely, 2^445185680 is an apocalyptic number.

445185680 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 445185680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529787520).

445185680 is an abundant number, since it is smaller than the sum of its proper divisors (614389360).

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

445185680 is a wasteful number, since it uses less digits than its factorization.

445185680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 445185680 is about 21099.4236888120. The cubic root of 445185680 is about 763.5668441832.

The spelling of 445185680 in words is "four hundred forty-five million, one hundred eighty-five thousand, six hundred eighty".