28727948 has 12 divisors (see below), whose sum is σ = 51895872. Its totient is φ = 13900560.

The previous prime is 28727927. The next prime is 28727953. The reversal of 28727948 is 84972782.

It is a happy number.

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, 115715 + ... + 115962.

It is an arithmetic number, because the mean of its divisors is an integer number (4324656).

Almost surely, 2^28727948 is an apocalyptic number.

It is an amenable number.

28727948 is a deficient number, since it is larger than the sum of its proper divisors (23167924).

28727948 is a wasteful number, since it uses less digits than its factorization.

28727948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231712 (or 231710 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 28727948 is about 5359.8458933070. The cubic root of 28727948 is about 306.2679385300.

The spelling of 28727948 in words is "twenty-eight million, seven hundred twenty-seven thousand, nine hundred forty-eight".