28131772606 has 32 divisors (see below), whose sum is σ = 48564131328. Its totient is φ = 11972046240.

The previous prime is 28131772597. The next prime is 28131772619. The reversal of 28131772606 is 60627713182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2968716 + ... + 2978176.

It is an arithmetic number, because the mean of its divisors is an integer number (1517629104).

Almost surely, 2^28131772606 is an apocalyptic number.

28131772606 is a deficient number, since it is larger than the sum of its proper divisors (20432358722).

28131772606 is a wasteful number, since it uses less digits than its factorization.

28131772606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10936.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 28131772606 in words is "twenty-eight billion, one hundred thirty-one million, seven hundred seventy-two thousand, six hundred six".