28121735 has 8 divisors (see below), whose sum is σ = 34909920. Its totient is φ = 21721504.

The previous prime is 28121719. The next prime is 28121749. The reversal of 28121735 is 53712182.

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 28121735 - 2⁴ = 28121719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 28121698 and 28121707.

It is a congruent number.

It is an unprimeable number.

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, 96827 + ... + 97116.

It is an arithmetic number, because the mean of its divisors is an integer number (4363740).

Almost surely, 2^28121735 is an apocalyptic number.

28121735 is a deficient number, since it is larger than the sum of its proper divisors (6788185).

28121735 is a wasteful number, since it uses less digits than its factorization.

28121735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193977.

The product of its digits is 3360, while the sum is 29.

The square root of 28121735 is about 5302.9930228127. The cubic root of 28121735 is about 304.0983313887.

The spelling of 28121735 in words is "twenty-eight million, one hundred twenty-one thousand, seven hundred thirty-five".