28250805689280 has 280 divisors, whose sum is σ = 101908488100320. Its totient is φ = 7427441387520.

The previous prime is 28250805689237. The next prime is 28250805689317. The reversal of 28250805689280 is 8298650805282.

28250805689280 is a `hidden beast` number, since 28 + 2 + 508 + 0 + 5 + 6 + 89 + 28 + 0 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5835195 + ... + 9515834.

Almost surely, 2^{28250805689280} is an apocalyptic number.

28250805689280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28250805689280 is an abundant number, since it is smaller than the sum of its proper divisors (73657682411040).

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

28250805689280 is a wasteful number, since it uses less digits than its factorization.

28250805689280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15351129 (or 15351110 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 28250805689280 in words is "twenty-eight trillion, two hundred fifty billion, eight hundred five million, six hundred eighty-nine thousand, two hundred eighty".