28891735 has 8 divisors (see below), whose sum is σ = 35238816. Its totient is φ = 22734240.

The previous prime is 28891717. The next prime is 28891739. The reversal of 28891735 is 53719882.

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

It is not a de Polignac number, because 28891735 - 2⁷ = 28891607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28891691 and 28891700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47059 + ... + 47668.

It is an arithmetic number, because the mean of its divisors is an integer number (4404852).

Almost surely, 2^28891735 is an apocalyptic number.

28891735 is a deficient number, since it is larger than the sum of its proper divisors (6347081).

28891735 is an equidigital number, since it uses as much as digits as its factorization.

28891735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94793.

The product of its digits is 120960, while the sum is 43.

The square root of 28891735 is about 5375.1032548222. The cubic root of 28891735 is about 306.8488789272.

It can be divided in two parts, 2889 and 1735, that added together give a square (4624 = 68²).

The spelling of 28891735 in words is "twenty-eight million, eight hundred ninety-one thousand, seven hundred thirty-five".