28233429 has 16 divisors (see below), whose sum is σ = 43253760. Its totient is φ = 16046640.

The previous prime is 28233421. The next prime is 28233437. The reversal of 28233429 is 92433282.

It is an interprime number because it is at equal distance from previous prime (28233421) and next prime (28233437).

It is not a de Polignac number, because 28233429 - 2³ = 28233421 is a prime.

It is a super-3 number, since 3×28233429³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28233429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28233421) 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, 492 + ... + 7530.

It is an arithmetic number, because the mean of its divisors is an integer number (2703360).

Almost surely, 2^28233429 is an apocalyptic number.

It is an amenable number.

28233429 is a deficient number, since it is larger than the sum of its proper divisors (15020331).

28233429 is a wasteful number, since it uses less digits than its factorization.

28233429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240.

The product of its digits is 20736, while the sum is 33.

The square root of 28233429 is about 5313.5138091474. The cubic root of 28233429 is about 304.5004057900.

The spelling of 28233429 in words is "twenty-eight million, two hundred thirty-three thousand, four hundred twenty-nine".