28706083540 has 12 divisors (see below), whose sum is σ = 60282775476. Its totient is φ = 11482433408.

The previous prime is 28706083537. The next prime is 28706083591. The reversal of 28706083540 is 4538060782.

It can be written as a sum of positive squares in 2 ways, for example, as 8667982404 + 20038101136 = 93102^2 + 141556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717652069 + ... + 717652108.

It is an arithmetic number, because the mean of its divisors is an integer number (5023564623).

Almost surely, 2^28706083540 is an apocalyptic number.

28706083540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28706083540 is an abundant number, since it is smaller than the sum of its proper divisors (31576691936).

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

28706083540 is a wasteful number, since it uses less digits than its factorization.

28706083540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435304186 (or 1435304184 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 28706083540 in words is "twenty-eight billion, seven hundred six million, eighty-three thousand, five hundred forty".