28772031892 has 24 divisors (see below), whose sum is σ = 53171576640. Its totient is φ = 13585023360.

The previous prime is 28772031889. The next prime is 28772031901. The reversal of 28772031892 is 29813027782.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 585013 + ... + 632284.

It is an arithmetic number, because the mean of its divisors is an integer number (2215482360).

Almost surely, 2^28772031892 is an apocalyptic number.

It is an amenable number.

28772031892 is a deficient number, since it is larger than the sum of its proper divisors (24399544748).

28772031892 is a wasteful number, since it uses less digits than its factorization.

28772031892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217631 (or 1217629 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 28772031892 in words is "twenty-eight billion, seven hundred seventy-two million, thirty-one thousand, eight hundred ninety-two".