28765653 has 8 divisors (see below), whose sum is σ = 43833408. Its totient is φ = 16437504.

The previous prime is 28765643. The next prime is 28765657. The reversal of 28765653 is 35656782.

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

It is not a de Polignac number, because 28765653 - 2⁵ = 28765621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28765657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684876 + ... + 684917.

It is an arithmetic number, because the mean of its divisors is an integer number (5479176).

Almost surely, 2^28765653 is an apocalyptic number.

It is an amenable number.

28765653 is a deficient number, since it is larger than the sum of its proper divisors (15067755).

28765653 is a wasteful number, since it uses less digits than its factorization.

28765653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369803.

The product of its digits is 302400, while the sum is 42.

The square root of 28765653 is about 5363.3620985348. The cubic root of 28765653 is about 306.4018706412.

The spelling of 28765653 in words is "twenty-eight million, seven hundred sixty-five thousand, six hundred fifty-three".