28696227840 has 624 divisors, whose sum is σ = 118743026688. Its totient is φ = 6267469824.

The previous prime is 28696227823. The next prime is 28696227853. The reversal of 28696227840 is 4872269682.

28696227840 is a `hidden beast` number, since 2 + 8 + 6 + 9 + 622 + 7 + 8 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29675037 + ... + 29676003.

It is an arithmetic number, because the mean of its divisors is an integer number (190293312).

Almost surely, 2^28696227840 is an apocalyptic number.

28696227840 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 28696227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59371513344).

28696227840 is an abundant number, since it is smaller than the sum of its proper divisors (90046798848).

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

28696227840 is a wasteful number, since it uses less digits than its factorization.

28696227840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 28696227840 in words is "twenty-eight billion, six hundred ninety-six million, two hundred twenty-seven thousand, eight hundred forty".