28669429 has 8 divisors (see below), whose sum is σ = 31403160. Its totient is φ = 26052096.

The previous prime is 28669427. The next prime is 28669453. The reversal of 28669429 is 92496682.

It can be written as a sum of positive squares in 4 ways, for example, as 864900 + 27804529 = 930^2 + 5273^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28669429 - 2¹ = 28669427 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28584 + ... + 29569.

It is an arithmetic number, because the mean of its divisors is an integer number (3925395).

Almost surely, 2^28669429 is an apocalyptic number.

28669429 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28669429 is a deficient number, since it is larger than the sum of its proper divisors (2733731).

28669429 is a wasteful number, since it uses less digits than its factorization.

28669429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58199.

The product of its digits is 373248, while the sum is 46.

The square root of 28669429 is about 5354.3840915646. The cubic root of 28669429 is about 306.0598406329.

The spelling of 28669429 in words is "twenty-eight million, six hundred sixty-nine thousand, four hundred twenty-nine".