28499109 has 8 divisors (see below), whose sum is σ = 38043840. Its totient is φ = 18976896.

The previous prime is 28499101. The next prime is 28499131. The reversal of 28499109 is 90199482.

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

It is not a de Polignac number, because 28499109 - 2³ = 28499101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28499101) 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, 2412 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (4755480).

Almost surely, 2^28499109 is an apocalyptic number.

It is an amenable number.

28499109 is a deficient number, since it is larger than the sum of its proper divisors (9544731).

28499109 is a wasteful number, since it uses less digits than its factorization.

28499109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11259.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 28499109 is about 5338.4556755676. The cubic root of 28499109 is about 305.4525540110.

The spelling of 28499109 in words is "twenty-eight million, four hundred ninety-nine thousand, one hundred nine".