28633705 has 16 divisors (see below), whose sum is σ = 35154000. Its totient is φ = 22383360.

The previous prime is 28633697. The next prime is 28633733. The reversal of 28633705 is 50733682.

It can be written as a sum of positive squares in 8 ways, for example, as 6927424 + 21706281 = 2632^2 + 4659^2 .

It is not a de Polignac number, because 28633705 - 2³ = 28633697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81871 + ... + 82219.

It is an arithmetic number, because the mean of its divisors is an integer number (2197125).

Almost surely, 2^28633705 is an apocalyptic number.

It is an amenable number.

28633705 is a deficient number, since it is larger than the sum of its proper divisors (6520295).

28633705 is a wasteful number, since it uses less digits than its factorization.

28633705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 28633705 is about 5351.0470937939. The cubic root of 28633705 is about 305.9326642103.

The spelling of 28633705 in words is "twenty-eight million, six hundred thirty-three thousand, seven hundred five".