28797305 has 8 divisors (see below), whose sum is σ = 34596744. Its totient is φ = 23011200.

The previous prime is 28797283. The next prime is 28797343. The reversal of 28797305 is 50379782.

It can be written as a sum of positive squares in 4 ways, for example, as 12020089 + 16777216 = 3467^2 + 4096^2 .

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

It is not a de Polignac number, because 28797305 - 2¹⁰ = 28796281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2285 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (4324593).

Almost surely, 2^28797305 is an apocalyptic number.

It is an amenable number.

28797305 is a deficient number, since it is larger than the sum of its proper divisors (5799439).

28797305 is a wasteful number, since it uses less digits than its factorization.

28797305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 28797305 is about 5366.3120483252. The cubic root of 28797305 is about 306.5142115299.

The spelling of 28797305 in words is "twenty-eight million, seven hundred ninety-seven thousand, three hundred five".