28255066020 has 36 divisors (see below), whose sum is σ = 85707034140. Its totient is φ = 7534684224.

The previous prime is 28255065913. The next prime is 28255066039. The reversal of 28255066020 is 2066055282.

28255066020 is a `hidden beast` number, since 2 + 82 + 550 + 6 + 6 + 0 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12979589184 + 15275476836 = 113928^2 + 123594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78486115 + ... + 78486474.

Almost surely, 2^28255066020 is an apocalyptic number.

28255066020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28255066020 is an abundant number, since it is smaller than the sum of its proper divisors (57451968120).

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

28255066020 is a wasteful number, since it uses less digits than its factorization.

28255066020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156972604 (or 156972599 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 28255066020 in words is "twenty-eight billion, two hundred fifty-five million, sixty-six thousand, twenty".