28621223576 has 32 divisors (see below), whose sum is σ = 60562155600. Its totient is φ = 12561037440.

The previous prime is 28621223563. The next prime is 28621223599. The reversal of 28621223576 is 67532212682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5605055 + ... + 5610158.

Almost surely, 2^28621223576 is an apocalyptic number.

It is an amenable number.

28621223576 is an abundant number, since it is smaller than the sum of its proper divisors (31940932024).

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

28621223576 is a wasteful number, since it uses less digits than its factorization.

28621223576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11215259 (or 11215255 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The spelling of 28621223576 in words is "twenty-eight billion, six hundred twenty-one million, two hundred twenty-three thousand, five hundred seventy-six".