28278519004560 has 80 divisors (see below), whose sum is σ = 95632809733440. Its totient is φ = 6855398545920.

The previous prime is 28278519004559. The next prime is 28278519004591. The reversal of 28278519004560 is 6540091587282.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×28278519004560² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28278519004560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5355777475 + ... + 5355782754.

It is an arithmetic number, because the mean of its divisors is an integer number (1195410121668).

Almost surely, 2^{28278519004560} is an apocalyptic number.

28278519004560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28278519004560 is an abundant number, since it is smaller than the sum of its proper divisors (67354290728880).

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

28278519004560 is a wasteful number, since it uses less digits than its factorization.

28278519004560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711560256 (or 10711560250 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 28278519004560 in words is "twenty-eight trillion, two hundred seventy-eight billion, five hundred nineteen million, four thousand, five hundred sixty".