28412909 has 8 divisors (see below), whose sum is σ = 32616768. Its totient is φ = 24245280.

The previous prime is 28412897. The next prime is 28412911. The reversal of 28412909 is 90921482.

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 28412909 - 2²⁰ = 27364333 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 (28412609) 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, 7352 + ... + 10529.

It is an arithmetic number, because the mean of its divisors is an integer number (4077096).

Almost surely, 2^28412909 is an apocalyptic number.

It is an amenable number.

28412909 is a deficient number, since it is larger than the sum of its proper divisors (4203859).

28412909 is a wasteful number, since it uses less digits than its factorization.

28412909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18115.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 28412909 is about 5330.3760655323. The cubic root of 28412909 is about 305.1442800311.

The spelling of 28412909 in words is "twenty-eight million, four hundred twelve thousand, nine hundred nine".