28236223550 has 24 divisors (see below), whose sum is σ = 52750759896. Its totient is φ = 11244729440.

The previous prime is 28236223541. The next prime is 28236223637. The reversal of 28236223550 is 5532263282.

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, 1232537 + ... + 1255236.

It is an arithmetic number, because the mean of its divisors is an integer number (2197948329).

Almost surely, 2^28236223550 is an apocalyptic number.

28236223550 is a deficient number, since it is larger than the sum of its proper divisors (24514536346).

28236223550 is a wasteful number, since it uses less digits than its factorization.

28236223550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488012 (or 2488007 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 28236223550 in words is "twenty-eight billion, two hundred thirty-six million, two hundred twenty-three thousand, five hundred fifty".