28805361 has 32 divisors (see below), whose sum is σ = 45722880. Its totient is φ = 15949824.

The previous prime is 28805353. The next prime is 28805369. The reversal of 28805361 is 16350882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28805353) and next prime (28805369).

It is not a de Polignac number, because 28805361 - 2³ = 28805353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28805369) 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, 14305 + ... + 16193.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^28805361 is an apocalyptic number.

It is an amenable number.

28805361 is a deficient number, since it is larger than the sum of its proper divisors (16917519).

28805361 is a wasteful number, since it uses less digits than its factorization.

28805361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28805361 is about 5367.0626044420. The cubic root of 28805361 is about 306.5427911518.

The spelling of 28805361 in words is "twenty-eight million, eight hundred five thousand, three hundred sixty-one".