28717712 has 20 divisors (see below), whose sum is σ = 56998956. Its totient is φ = 14008320.

The previous prime is 28717699. The next prime is 28717727. The reversal of 28717712 is 21771782.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 27709696 = 1004^2 + 5264^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21233 + ... + 22544.

Almost surely, 2^28717712 is an apocalyptic number.

It is an amenable number.

28717712 is a deficient number, since it is larger than the sum of its proper divisors (28281244).

28717712 is a wasteful number, since it uses less digits than its factorization.

28717712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43826 (or 43820 counting only the distinct ones).

The product of its digits is 10976, while the sum is 35.

The square root of 28717712 is about 5358.8909300339. The cubic root of 28717712 is about 306.2315589618.

The spelling of 28717712 in words is "twenty-eight million, seven hundred seventeen thousand, seven hundred twelve".