28266097860 has 864 divisors, whose sum is σ = 119167880832. Its totient is φ = 5329981440.

The previous prime is 28266097823. The next prime is 28266097889. The reversal of 28266097860 is 6879066282.

28266097860 is a `hidden beast` number, since 2 + 8 + 26 + 609 + 7 + 8 + 6 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28266097797 and 28266097806.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 92071827 + ... + 92072133.

It is an arithmetic number, because the mean of its divisors is an integer number (137925788).

Almost surely, 2^28266097860 is an apocalyptic number.

28266097860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28266097860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59583940416).

28266097860 is an abundant number, since it is smaller than the sum of its proper divisors (90901782972).

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

28266097860 is a wasteful number, since it uses less digits than its factorization.

28266097860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28266097860 in words is "twenty-eight billion, two hundred sixty-six million, ninety-seven thousand, eight hundred sixty".