445312720 has 20 divisors (see below), whose sum is σ = 1035352260. Its totient is φ = 178125056.

The previous prime is 445312711. The next prime is 445312727. The reversal of 445312720 is 27213544.

It can be written as a sum of positive squares in 2 ways, for example, as 199826496 + 245486224 = 14136^2 + 15668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445312727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2783125 + ... + 2783284.

It is an arithmetic number, because the mean of its divisors is an integer number (51767613).

Almost surely, 2^445312720 is an apocalyptic number.

445312720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

445312720 is an abundant number, since it is smaller than the sum of its proper divisors (590039540).

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

445312720 is a wasteful number, since it uses less digits than its factorization.

445312720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566422 (or 5566416 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 445312720 is about 21102.4339828371. The cubic root of 445312720 is about 763.6394687911.

The spelling of 445312720 in words is "four hundred forty-five million, three hundred twelve thousand, seven hundred twenty".