28055866372 has 24 divisors (see below), whose sum is σ = 50844288600. Its totient is φ = 13529945856.

The previous prime is 28055866361. The next prime is 28055866429. The reversal of 28055866372 is 27366855082.

It can be written as a sum of positive squares in 4 ways, for example, as 6956560836 + 21099305536 = 83406^2 + 145256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16347 + ... + 237442.

It is an arithmetic number, because the mean of its divisors is an integer number (2118512025).

Almost surely, 2^28055866372 is an apocalyptic number.

It is an amenable number.

28055866372 is a deficient number, since it is larger than the sum of its proper divisors (22788422228).

28055866372 is a wasteful number, since it uses less digits than its factorization.

28055866372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254775 (or 254773 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 28055866372 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-six thousand, three hundred seventy-two".