622720085 has 8 divisors (see below), whose sum is σ = 804746040. Its totient is φ = 459854784.

The previous prime is 622720067. The next prime is 622720093. The reversal of 622720085 is 580027226.

It can be written as a sum of positive squares in 4 ways, for example, as 4153444 + 618566641 = 2038^2 + 24871^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 622720085 - 2⁸ = 622719829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4790090 + ... + 4790219.

It is an arithmetic number, because the mean of its divisors is an integer number (100593255).

Almost surely, 2^622720085 is an apocalyptic number.

622720085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

622720085 is a deficient number, since it is larger than the sum of its proper divisors (182025955).

622720085 is a wasteful number, since it uses less digits than its factorization.

622720085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9580327.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 622720085 is about 24954.3600398808. The cubic root of 622720085 is about 853.9470800152.

The spelling of 622720085 in words is "six hundred twenty-two million, seven hundred twenty thousand, eighty-five".