28352805 has 16 divisors (see below), whose sum is σ = 48854400. Its totient is φ = 13958208.

The previous prime is 28352801. The next prime is 28352839. The reversal of 28352805 is 50825382.

28352805 = 401² + 402² + ... + 530².

It is not a de Polignac number, because 28352805 - 2² = 28352801 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 (28352801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72505 + ... + 72894.

It is an arithmetic number, because the mean of its divisors is an integer number (3053400).

Almost surely, 2^28352805 is an apocalyptic number.

It is an amenable number.

28352805 is a deficient number, since it is larger than the sum of its proper divisors (20501595).

28352805 is a wasteful number, since it uses less digits than its factorization.

28352805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145420.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28352805 is about 5324.7352046839. The cubic root of 28352805 is about 304.9289631212.

The spelling of 28352805 in words is "twenty-eight million, three hundred fifty-two thousand, eight hundred five".