28764305144 has 16 divisors (see below), whose sum is σ = 54096016920. Its totient is φ = 14338700640.

The previous prime is 28764305107. The next prime is 28764305173. The reversal of 28764305144 is 44150346782.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28764305095 and 28764305104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428679 + ... + 5433974.

Almost surely, 2^28764305144 is an apocalyptic number.

It is an amenable number.

28764305144 is a deficient number, since it is larger than the sum of its proper divisors (25331711776).

28764305144 is a wasteful number, since it uses less digits than its factorization.

28764305144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862990 (or 10862986 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 28764305144 in words is "twenty-eight billion, seven hundred sixty-four million, three hundred five thousand, one hundred forty-four".