28713651 has 16 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 18692960.

The previous prime is 28713613. The next prime is 28713667. The reversal of 28713651 is 15631782.

It is a cyclic number.

It is not a de Polignac number, because 28713651 - 2⁷ = 28713523 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28711651) 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 15 ways as a sum of consecutive naturals, for example, 66406 + ... + 66836.

It is an arithmetic number, because the mean of its divisors is an integer number (2449440).

Almost surely, 2^28713651 is an apocalyptic number.

28713651 is a deficient number, since it is larger than the sum of its proper divisors (10477389).

28713651 is a wasteful number, since it uses less digits than its factorization.

28713651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 10080, while the sum is 33.

The square root of 28713651 is about 5358.5120136097. The cubic root of 28713651 is about 306.2171234456.

The spelling of 28713651 in words is "twenty-eight million, seven hundred thirteen thousand, six hundred fifty-one".