28281088620 has 72 divisors (see below), whose sum is σ = 85814361360. Its totient is φ = 7539127680.

The previous prime is 28281088607. The next prime is 28281088651. The reversal of 28281088620 is 2688018282.

28281088620 is a `hidden beast` number, since 2 + 8 + 2 + 8 + 10 + 8 + 8 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555391 + ... + 604169.

It is an arithmetic number, because the mean of its divisors is an integer number (1191866130).

Almost surely, 2^28281088620 is an apocalyptic number.

28281088620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28281088620 is an abundant number, since it is smaller than the sum of its proper divisors (57533272740).

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

28281088620 is a wasteful number, since it uses less digits than its factorization.

28281088620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52015 (or 52010 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The spelling of 28281088620 in words is "twenty-eight billion, two hundred eighty-one million, eighty-eight thousand, six hundred twenty".