28287178372 has 24 divisors (see below), whose sum is σ = 49766675840. Its totient is φ = 14068300320.

The previous prime is 28287178349. The next prime is 28287178411. The reversal of 28287178372 is 27387178282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649918 + ... + 692074.

Almost surely, 2^28287178372 is an apocalyptic number.

It is an amenable number.

28287178372 is a deficient number, since it is larger than the sum of its proper divisors (21479497468).

28287178372 is a wasteful number, since it uses less digits than its factorization.

28287178372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43051 (or 43049 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 55.

The spelling of 28287178372 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred seventy-eight thousand, three hundred seventy-two".