28617772 has 12 divisors (see below), whose sum is σ = 50644440. Its totient is φ = 14147936.

The previous prime is 28617767. The next prime is 28617779. The reversal of 28617772 is 27771682.

It is not an unprimeable number, because it can be changed into a prime (28617779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39838 + ... + 40549.

It is an arithmetic number, because the mean of its divisors is an integer number (4220370).

Almost surely, 2^28617772 is an apocalyptic number.

It is an amenable number.

28617772 is a deficient number, since it is larger than the sum of its proper divisors (22026668).

28617772 is a wasteful number, since it uses less digits than its factorization.

28617772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80480 (or 80478 counting only the distinct ones).

The product of its digits is 65856, while the sum is 40.

The square root of 28617772 is about 5349.5581125921. The cubic root of 28617772 is about 305.8759090736.

The spelling of 28617772 in words is "twenty-eight million, six hundred seventeen thousand, seven hundred seventy-two".