28555277 has 8 divisors (see below), whose sum is σ = 29050560. Its totient is φ = 28062720.

The previous prime is 28555253. The next prime is 28555301. The reversal of 28555277 is 77255582.

It is an interprime number because it is at equal distance from previous prime (28555253) and next prime (28555301).

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 28555277 - 2¹² = 28551181 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 (28555777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36749 + ... + 37517.

It is an arithmetic number, because the mean of its divisors is an integer number (3631320).

Almost surely, 2^28555277 is an apocalyptic number.

It is an amenable number.

28555277 is a deficient number, since it is larger than the sum of its proper divisors (495283).

28555277 is an equidigital number, since it uses as much as digits as its factorization.

28555277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363.

The product of its digits is 196000, while the sum is 41.

The square root of 28555277 is about 5343.7137835030. The cubic root of 28555277 is about 305.6530912770.

The spelling of 28555277 in words is "twenty-eight million, five hundred fifty-five thousand, two hundred seventy-seven".