28985321802 has 16 divisors (see below), whose sum is σ = 58136752800. Its totient is φ = 9634089072.

The previous prime is 28985321779. The next prime is 28985321831. The reversal of 28985321802 is 20812358982.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6918948 + ... + 6923135.

It is an arithmetic number, because the mean of its divisors is an integer number (3633547050).

Almost surely, 2^28985321802 is an apocalyptic number.

28985321802 is an abundant number, since it is smaller than the sum of its proper divisors (29151430998).

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

28985321802 is a wasteful number, since it uses less digits than its factorization.

28985321802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13842437.

The product of its (nonzero) digits is 552960, while the sum is 48.

It can be divided in two parts, 289853 and 21802, that added together give a triangular number (311655 = T₇₈₉).

The spelling of 28985321802 in words is "twenty-eight billion, nine hundred eighty-five million, three hundred twenty-one thousand, eight hundred two".