28072255 has 8 divisors (see below), whose sum is σ = 34113600. Its totient is φ = 22173216.

The previous prime is 28072241. The next prime is 28072271. The reversal of 28072255 is 55227082.

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

It is a cyclic number.

It is not a de Polignac number, because 28072255 - 2⁷ = 28072127 is a prime.

It is a congruent 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, 35140 + ... + 35929.

It is an arithmetic number, because the mean of its divisors is an integer number (4264200).

Almost surely, 2^28072255 is an apocalyptic number.

28072255 is a deficient number, since it is larger than the sum of its proper divisors (6041345).

28072255 is an equidigital number, since it uses as much as digits as its factorization.

28072255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71153.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28072255 is about 5298.3256789291. The cubic root of 28072255 is about 303.9198737061.

The spelling of 28072255 in words is "twenty-eight million, seventy-two thousand, two hundred fifty-five".