28928026550 has 24 divisors (see below), whose sum is σ = 53849325000. Its totient is φ = 11561921280.

The previous prime is 28928026511. The next prime is 28928026571. The reversal of 28928026550 is 5562082982.

It is a junction number, because it is equal to n+sod(n) for n = 28928026495 and 28928026504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169160 + ... + 294059.

It is an arithmetic number, because the mean of its divisors is an integer number (2243721875).

Almost surely, 2^28928026550 is an apocalyptic number.

28928026550 is a deficient number, since it is larger than the sum of its proper divisors (24921298450).

28928026550 is a wasteful number, since it uses less digits than its factorization.

28928026550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464480 (or 464475 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 28928026550 in words is "twenty-eight billion, nine hundred twenty-eight million, twenty-six thousand, five hundred fifty".