28492809 has 8 divisors (see below), whose sum is σ = 38056032. Its totient is φ = 18962400.

The previous prime is 28492777. The next prime is 28492817. The reversal of 28492809 is 90829482.

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

It is not a de Polignac number, because 28492809 - 2⁵ = 28492777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28492309) 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, 6099 + ... + 9704.

It is an arithmetic number, because the mean of its divisors is an integer number (4757004).

Almost surely, 2^28492809 is an apocalyptic number.

It is an amenable number.

28492809 is a deficient number, since it is larger than the sum of its proper divisors (9563223).

28492809 is a wasteful number, since it uses less digits than its factorization.

28492809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16407.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 28492809 is about 5337.8655846696. The cubic root of 28492809 is about 305.4300446183.

The spelling of 28492809 in words is "twenty-eight million, four hundred ninety-two thousand, eight hundred nine".