28715972 has 12 divisors (see below), whose sum is σ = 50586816. Its totient is φ = 14262600.

The previous prime is 28715971. The next prime is 28716001. The reversal of 28715972 is 27951782.

It is not an unprimeable number, because it can be changed into a prime (28715971) by changing a digit.

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, 23168 + ... + 24375.

It is an arithmetic number, because the mean of its divisors is an integer number (4215568).

Almost surely, 2^28715972 is an apocalyptic number.

It is an amenable number.

28715972 is a deficient number, since it is larger than the sum of its proper divisors (21870844).

28715972 is a wasteful number, since it uses less digits than its factorization.

28715972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47698 (or 47696 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 28715972 is about 5358.7285805497. The cubic root of 28715972 is about 306.2253740021.

The spelling of 28715972 in words is "twenty-eight million, seven hundred fifteen thousand, nine hundred seventy-two".