28609469 has 8 divisors (see below), whose sum is σ = 33185088. Its totient is φ = 24156000.

The previous prime is 28609463. The next prime is 28609489. The reversal of 28609469 is 96490682.

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 28609469 - 2⁸ = 28609213 is a prime.

It is a super-2 number, since 2×28609469² = 1637003432923922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28609463) 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, 30032 + ... + 30969.

It is an arithmetic number, because the mean of its divisors is an integer number (4148136).

Almost surely, 2^28609469 is an apocalyptic number.

It is an amenable number.

28609469 is a deficient number, since it is larger than the sum of its proper divisors (4575619).

28609469 is an equidigital number, since it uses as much as digits as its factorization.

28609469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61075.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 28609469 is about 5348.7820108881. The cubic root of 28609469 is about 305.8463245048.

The spelling of 28609469 in words is "twenty-eight million, six hundred nine thousand, four hundred sixty-nine".