28432269 has 16 divisors (see below), whose sum is σ = 42499200. Its totient is φ = 18785088.

The previous prime is 28432249. The next prime is 28432289. The reversal of 28432269 is 96223482.

It is an interprime number because it is at equal distance from previous prime (28432249) and next prime (28432289).

It is not a de Polignac number, because 28432269 - 2⁸ = 28432013 is a prime.

It is a super-2 number, since 2×28432269² = 1616787840976722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (2656200).

Almost surely, 2^28432269 is an apocalyptic number.

It is an amenable number.

28432269 is a deficient number, since it is larger than the sum of its proper divisors (14066931).

28432269 is a wasteful number, since it uses less digits than its factorization.

28432269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441 (or 9435 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28432269 is about 5332.1917632433. The cubic root of 28432269 is about 305.2135707421.

The spelling of 28432269 in words is "twenty-eight million, four hundred thirty-two thousand, two hundred sixty-nine".