28749553472 has 28 divisors (see below), whose sum is σ = 57365111076. Its totient is φ = 14295352320.

The previous prime is 28749553403. The next prime is 28749553489. The reversal of 28749553472 is 27435594782.

It can be written as a sum of positive squares in 2 ways, for example, as 6194319616 + 22555233856 = 78704^2 + 150184^2 .

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, 1229333 + ... + 1252500.

It is an arithmetic number, because the mean of its divisors is an integer number (2048753967).

Almost surely, 2^28749553472 is an apocalyptic number.

It is an amenable number.

28749553472 is a deficient number, since it is larger than the sum of its proper divisors (28615557604).

28749553472 is a wasteful number, since it uses less digits than its factorization.

28749553472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482026 (or 2482016 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The spelling of 28749553472 in words is "twenty-eight billion, seven hundred forty-nine million, five hundred fifty-three thousand, four hundred seventy-two".