28153269 has 24 divisors (see below), whose sum is σ = 43524000. Its totient is φ = 17483040.

The previous prime is 28153259. The next prime is 28153273. The reversal of 28153269 is 96235182.

It is not a de Polignac number, because 28153269 - 2¹⁶ = 28087733 is a prime.

It is a super-2 number, since 2×28153269² = 1585213110772722, which contains 22 as substring.

It is the 61-st Perrin number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28153249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9082 + ... + 11780.

It is an arithmetic number, because the mean of its divisors is an integer number (1813500).

Almost surely, 2^28153269 is an apocalyptic number.

It is an amenable number.

28153269 is a deficient number, since it is larger than the sum of its proper divisors (15370731).

28153269 is a wasteful number, since it uses less digits than its factorization.

28153269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2782 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28153269 is about 5305.9654163969. The cubic root of 28153269 is about 304.2119547086.

It can be divided in two parts, 2815 and 3269, that added together give a square (6084 = 78²).

The spelling of 28153269 in words is "twenty-eight million, one hundred fifty-three thousand, two hundred sixty-nine".