28213535 has 16 divisors (see below), whose sum is σ = 39638592. Its totient is φ = 18873600.

The previous prime is 28213531. The next prime is 28213541. The reversal of 28213535 is 53531282.

It is not a de Polignac number, because 28213535 - 2² = 28213531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28213498 and 28213507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213531) 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 15 ways as a sum of consecutive naturals, for example, 8396 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (2477412).

Almost surely, 2^28213535 is an apocalyptic number.

28213535 is a deficient number, since it is larger than the sum of its proper divisors (11425057).

28213535 is a wasteful number, since it uses less digits than its factorization.

28213535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19714.

The product of its digits is 7200, while the sum is 29.

The square root of 28213535 is about 5311.6414600385. The cubic root of 28213535 is about 304.4288693802.

The spelling of 28213535 in words is "twenty-eight million, two hundred thirteen thousand, five hundred thirty-five".