28266555 has 8 divisors (see below), whose sum is σ = 45226512. Its totient is φ = 15075488.

The previous prime is 28266533. The next prime is 28266559. The reversal of 28266555 is 55566282.

It is a happy number.

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 28266555 - 2⁸ = 28266299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28266559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942204 + ... + 942233.

It is an arithmetic number, because the mean of its divisors is an integer number (5653314).

Almost surely, 2^28266555 is an apocalyptic number.

28266555 is a deficient number, since it is larger than the sum of its proper divisors (16959957).

28266555 is a wasteful number, since it uses less digits than its factorization.

28266555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884445.

The product of its digits is 144000, while the sum is 39.

The square root of 28266555 is about 5316.6300416711. The cubic root of 28266555 is about 304.6194483390.

The spelling of 28266555 in words is "twenty-eight million, two hundred sixty-six thousand, five hundred fifty-five".