28633685 has 8 divisors (see below), whose sum is σ = 34612056. Its totient is φ = 22739200.

The previous prime is 28633679. The next prime is 28633687. The reversal of 28633685 is 58633682.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 28633201 = 22^2 + 5351^2 .

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

It is not a de Polignac number, because 28633685 - 2¹² = 28629589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28633687) 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, 20216 + ... + 21585.

It is an arithmetic number, because the mean of its divisors is an integer number (4326507).

Almost surely, 2^28633685 is an apocalyptic number.

It is an amenable number.

28633685 is a deficient number, since it is larger than the sum of its proper divisors (5978371).

28633685 is a wasteful number, since it uses less digits than its factorization.

28633685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41943.

The product of its digits is 207360, while the sum is 41.

The square root of 28633685 is about 5351.0452250004. The cubic root of 28633685 is about 305.9325929813.

The spelling of 28633685 in words is "twenty-eight million, six hundred thirty-three thousand, six hundred eighty-five".