28633555 has 4 divisors (see below), whose sum is σ = 34360272. Its totient is φ = 22906840.

The previous prime is 28633543. The next prime is 28633567. The reversal of 28633555 is 55533682.

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

It is an interprime number because it is at equal distance from previous prime (28633543) and next prime (28633567).

It is not a de Polignac number, because 28633555 - 2⁹ = 28633043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863351 + ... + 2863360.

It is an arithmetic number, because the mean of its divisors is an integer number (8590068).

Almost surely, 2^28633555 is an apocalyptic number.

28633555 is a deficient number, since it is larger than the sum of its proper divisors (5726717).

28633555 is an equidigital number, since it uses as much as digits as its factorization.

28633555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726716.

The product of its digits is 108000, while the sum is 37.

The square root of 28633555 is about 5351.0330778271. The cubic root of 28633555 is about 305.9321299916.

The spelling of 28633555 in words is "twenty-eight million, six hundred thirty-three thousand, five hundred fifty-five".