28227805120 has 56 divisors (see below), whose sum is σ = 68164240608. Its totient is φ = 11132083200.

The previous prime is 28227805097. The next prime is 28227805127. The reversal of 28227805120 is 2150872282.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28227805120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28227805127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598491 + ... + 643930.

Almost surely, 2^28227805120 is an apocalyptic number.

28227805120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28227805120 is an abundant number, since it is smaller than the sum of its proper divisors (39936435488).

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

28227805120 is a wasteful number, since it uses less digits than its factorization.

28227805120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242509 (or 1242499 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 28227805120 in words is "twenty-eight billion, two hundred twenty-seven million, eight hundred five thousand, one hundred twenty".