720445085 has 8 divisors (see below), whose sum is σ = 866035896. Its totient is φ = 575354880.

The previous prime is 720445081. The next prime is 720445157. The reversal of 720445085 is 580544027.

It can be written as a sum of positive squares in 4 ways, for example, as 358950916 + 361494169 = 18946^2 + 19013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720445085 - 2² = 720445081 is a prime.

It is a super-2 number, since 2×720445085² = 1038082241001314450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720445081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121976 + ... + 127745.

It is an arithmetic number, because the mean of its divisors is an integer number (108254487).

Almost surely, 2^720445085 is an apocalyptic number.

It is an amenable number.

720445085 is a deficient number, since it is larger than the sum of its proper divisors (145590811).

720445085 is a wasteful number, since it uses less digits than its factorization.

720445085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250303.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 720445085 is about 26841.1081179597. The cubic root of 720445085 is about 896.4655970122.

The spelling of 720445085 in words is "seven hundred twenty million, four hundred forty-five thousand, eighty-five".