28287334450 has 48 divisors (see below), whose sum is σ = 55902660840. Its totient is φ = 10649256960.

The previous prime is 28287334333. The next prime is 28287334469. The reversal of 28287334450 is 5443378282.

It can be written as a sum of positive squares in 12 ways, for example, as 5016747241 + 23270587209 = 70829^2 + 152547^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28287334450.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188074 + ... + 303226.

Almost surely, 2^28287334450 is an apocalyptic number.

28287334450 is a deficient number, since it is larger than the sum of its proper divisors (27615326390).

28287334450 is a wasteful number, since it uses less digits than its factorization.

28287334450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115216 (or 115177 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 28287334450 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, four hundred fifty".