28046109 has 32 divisors (see below), whose sum is σ = 48455680. Its totient is φ = 14012352.

The previous prime is 28046101. The next prime is 28046113. The reversal of 28046109 is 90164082.

28046109 = 183² + 184² + ... + 448².

It is not a de Polignac number, because 28046109 - 2³ = 28046101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28046101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2484 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (1514240).

Almost surely, 2^28046109 is an apocalyptic number.

It is an amenable number.

28046109 is a deficient number, since it is larger than the sum of its proper divisors (20409571).

28046109 is a wasteful number, since it uses less digits than its factorization.

28046109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5449.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28046109 is about 5295.8577208985. The cubic root of 28046109 is about 303.8254892055.

The spelling of 28046109 in words is "twenty-eight million, forty-six thousand, one hundred nine".