623808645 has 32 divisors (see below), whose sum is σ = 1066915584. Its totient is φ = 310464000.

The previous prime is 623808637. The next prime is 623808671. The reversal of 623808645 is 546808326.

It is not a de Polignac number, because 623808645 - 2³ = 623808637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623808597 and 623808606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7906 + ... + 36195.

It is an arithmetic number, because the mean of its divisors is an integer number (33341112).

Almost surely, 2^623808645 is an apocalyptic number.

It is an amenable number.

623808645 is a deficient number, since it is larger than the sum of its proper divisors (443106939).

623808645 is a wasteful number, since it uses less digits than its factorization.

623808645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44173.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 623808645 is about 24976.1615345513. The cubic root of 623808645 is about 854.4443775586. Note that the first 3 decimals are identical.

The spelling of 623808645 in words is "six hundred twenty-three million, eight hundred eight thousand, six hundred forty-five".