28502513550 has 576 divisors, whose sum is σ = 95163552000. Its totient is φ = 6250970880.

The previous prime is 28502513521. The next prime is 28502513587. The reversal of 28502513550 is 5531520582.

28502513550 is a `hidden beast` number, since 2 + 8 + 50 + 2 + 51 + 3 + 550 = 666.

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 287 ways as a sum of consecutive naturals, for example, 261490896 + ... + 261491004.

It is an arithmetic number, because the mean of its divisors is an integer number (165214500).

Almost surely, 2^28502513550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28502513550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47581776000).

28502513550 is an abundant number, since it is smaller than the sum of its proper divisors (66661038450).

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

28502513550 is a wasteful number, since it uses less digits than its factorization.

28502513550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 28502513550 in words is "twenty-eight billion, five hundred two million, five hundred thirteen thousand, five hundred fifty".