623206644 has 24 divisors (see below), whose sum is σ = 1455740160. Its totient is φ = 207508224.

The previous prime is 623206637. The next prime is 623206673. The reversal of 623206644 is 446602326.

It is a super-2 number, since 2×623206644² = 776773042251485472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16804 + ... + 39099.

It is an arithmetic number, because the mean of its divisors is an integer number (60655840).

Almost surely, 2^623206644 is an apocalyptic number.

It is an amenable number.

623206644 is an abundant number, since it is smaller than the sum of its proper divisors (832533516).

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

623206644 is a wasteful number, since it uses less digits than its factorization.

623206644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56839 (or 56837 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 623206644 is about 24964.1071140147. The cubic root of 623206644 is about 854.1694311053.

The spelling of 623206644 in words is "six hundred twenty-three million, two hundred six thousand, six hundred forty-four".