28213735 has 8 divisors (see below), whose sum is σ = 36934416. Its totient is φ = 20519040.

The previous prime is 28213733. The next prime is 28213747. The reversal of 28213735 is 53731282.

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

It is not a de Polignac number, because 28213735 - 2¹ = 28213733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28213697 and 28213706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213733) 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, 256434 + ... + 256543.

It is an arithmetic number, because the mean of its divisors is an integer number (4616802).

Almost surely, 2^28213735 is an apocalyptic number.

28213735 is a deficient number, since it is larger than the sum of its proper divisors (8720681).

28213735 is a wasteful number, since it uses less digits than its factorization.

28213735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512993.

The product of its digits is 10080, while the sum is 31.

The square root of 28213735 is about 5311.6602865771. The cubic root of 28213735 is about 304.4295887232.

It can be divided in two parts, 2821 and 3735, that added together give a palindrome (6556).

The spelling of 28213735 in words is "twenty-eight million, two hundred thirteen thousand, seven hundred thirty-five".