623256530 has 64 divisors (see below), whose sum is σ = 1282417920. Its totient is φ = 216327936.

The previous prime is 623256523. The next prime is 623256541. The reversal of 623256530 is 35652326.

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 31 ways as a sum of consecutive naturals, for example, 174644 + ... + 178176.

It is an arithmetic number, because the mean of its divisors is an integer number (20037780).

Almost surely, 2^623256530 is an apocalyptic number.

623256530 is an abundant number, since it is smaller than the sum of its proper divisors (659161390).

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

623256530 is a wasteful number, since it uses less digits than its factorization.

623256530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 623256530 is about 24965.1062485222. The cubic root of 623256530 is about 854.1922218119.

The spelling of 623256530 in words is "six hundred twenty-three million, two hundred fifty-six thousand, five hundred thirty".