28736772 has 12 divisors (see below), whose sum is σ = 67052496. Its totient is φ = 9578920.

The previous prime is 28736731. The next prime is 28736789. The reversal of 28736772 is 27763782.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197354 + ... + 1197377.

It is an arithmetic number, because the mean of its divisors is an integer number (5587708).

Almost surely, 2^28736772 is an apocalyptic number.

It is an amenable number.

28736772 is an abundant number, since it is smaller than the sum of its proper divisors (38315724).

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

28736772 is a wasteful number, since it uses less digits than its factorization.

28736772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394738 (or 2394736 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 28736772 is about 5360.6689881021. The cubic root of 28736772 is about 306.2992928014.

The spelling of 28736772 in words is "twenty-eight million, seven hundred thirty-six thousand, seven hundred seventy-two".