28078275620 has 24 divisors (see below), whose sum is σ = 62067768000. Its totient is φ = 10640188512.

The previous prime is 28078275619. The next prime is 28078275679. The reversal of 28078275620 is 2657287082.

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, 36944720 + ... + 36945479.

It is an arithmetic number, because the mean of its divisors is an integer number (2586157000).

Almost surely, 2^28078275620 is an apocalyptic number.

28078275620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28078275620 is an abundant number, since it is smaller than the sum of its proper divisors (33989492380).

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

28078275620 is a wasteful number, since it uses less digits than its factorization.

28078275620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73890227 (or 73890225 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 28078275620 in words is "twenty-eight billion, seventy-eight million, two hundred seventy-five thousand, six hundred twenty".