28516463850 has 144 divisors (see below), whose sum is σ = 87106710528. Its totient is φ = 6134607360.

The previous prime is 28516463849. The next prime is 28516463851. The reversal of 28516463850 is 5836461582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28516463849) and next prime (28516463851).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28516463850.

It is not an unprimeable number, because it can be changed into a prime (28516463851) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10839 + ... + 239061.

It is an arithmetic number, because the mean of its divisors is an integer number (604907712).

Almost surely, 2^28516463850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28516463850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43553355264).

28516463850 is an abundant number, since it is smaller than the sum of its proper divisors (58590246678).

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

28516463850 is a wasteful number, since it uses less digits than its factorization.

28516463850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228269 (or 228257 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 28516463850 in words is "twenty-eight billion, five hundred sixteen million, four hundred sixty-three thousand, eight hundred fifty".