28633601 has 4 divisors (see below), whose sum is σ = 28917204. Its totient is φ = 28350000.

The previous prime is 28633567. The next prime is 28633607. The reversal of 28633601 is 10633682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27552001 + 1081600 = 5249^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 28633601 - 2¹⁰ = 28632577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28633607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141650 + ... + 141851.

It is an arithmetic number, because the mean of its divisors is an integer number (7229301).

Almost surely, 2^28633601 is an apocalyptic number.

It is an amenable number.

28633601 is a deficient number, since it is larger than the sum of its proper divisors (283603).

28633601 is a wasteful number, since it uses less digits than its factorization.

28633601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283602.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28633601 is about 5351.0373760608. The cubic root of 28633601 is about 305.9322938189.

The spelling of 28633601 in words is "twenty-eight million, six hundred thirty-three thousand, six hundred one".