28469109 has 8 divisors (see below), whose sum is σ = 38675232. Its totient is φ = 18621200.

The previous prime is 28469099. The next prime is 28469117. The reversal of 28469109 is 90196482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28469109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28469159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89367 + ... + 89684.

It is an arithmetic number, because the mean of its divisors is an integer number (4834404).

Almost surely, 2^28469109 is an apocalyptic number.

It is an amenable number.

28469109 is a deficient number, since it is larger than the sum of its proper divisors (10206123).

28469109 is a wasteful number, since it uses less digits than its factorization.

28469109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179107.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 28469109 is about 5335.6451343769. The cubic root of 28469109 is about 305.3453366954.

The spelling of 28469109 in words is "twenty-eight million, four hundred sixty-nine thousand, one hundred nine".