28631623648 has 24 divisors (see below), whose sum is σ = 56414676528. Its totient is φ = 14304086784.

The previous prime is 28631623639. The next prime is 28631623649. The reversal of 28631623648 is 84632613682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631623649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326661 + ... + 404932.

It is an arithmetic number, because the mean of its divisors is an integer number (2350611522).

Almost surely, 2^28631623648 is an apocalyptic number.

It is an amenable number.

28631623648 is a deficient number, since it is larger than the sum of its proper divisors (27783052880).

28631623648 is a wasteful number, since it uses less digits than its factorization.

28631623648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732826 (or 732818 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 49.

The spelling of 28631623648 in words is "twenty-eight billion, six hundred thirty-one million, six hundred twenty-three thousand, six hundred forty-eight".