28388651 has 8 divisors (see below), whose sum is σ = 29630880. Its totient is φ = 27164032.

The previous prime is 28388639. The next prime is 28388669. The reversal of 28388651 is 15688382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28388651 - 2¹⁰ = 28387627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28388599 and 28388608.

It is not an unprimeable number, because it can be changed into a prime (28388621) 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 7 ways as a sum of consecutive naturals, for example, 1055 + ... + 7608.

It is an arithmetic number, because the mean of its divisors is an integer number (3703860).

Almost surely, 2^28388651 is an apocalyptic number.

28388651 is a deficient number, since it is larger than the sum of its proper divisors (1242229).

28388651 is a wasteful number, since it uses less digits than its factorization.

28388651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8805.

The product of its digits is 92160, while the sum is 41.

The square root of 28388651 is about 5328.1001304405. The cubic root of 28388651 is about 305.0574146146.

The spelling of 28388651 in words is "twenty-eight million, three hundred eighty-eight thousand, six hundred fifty-one".