28891626500 has 48 divisors (see below), whose sum is σ = 68835626496. Its totient is φ = 10506044000.

The previous prime is 28891626493. The next prime is 28891626521. The reversal of 28891626500 is 562619882.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621012 + ... + 2632011.

It is an arithmetic number, because the mean of its divisors is an integer number (1434075552).

Almost surely, 2^28891626500 is an apocalyptic number.

28891626500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28891626500 is an abundant number, since it is smaller than the sum of its proper divisors (39943999996).

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

28891626500 is a wasteful number, since it uses less digits than its factorization.

28891626500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253053 (or 5253041 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 28891626500 in words is "twenty-eight billion, eight hundred ninety-one million, six hundred twenty-six thousand, five hundred".