28628855 has 8 divisors (see below), whose sum is σ = 34395072. Its totient is φ = 22876128.

The previous prime is 28628843. The next prime is 28628891. The reversal of 28628855 is 55882682.

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 28628855 - 2⁶ = 28628791 is a prime.

It is a super-2 number, since 2×28628855² = 1639222677222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (4299384).

Almost surely, 2^28628855 is an apocalyptic number.

28628855 is a deficient number, since it is larger than the sum of its proper divisors (5766217).

28628855 is an equidigital number, since it uses as much as digits as its factorization.

28628855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745.

The product of its digits is 307200, while the sum is 44.

The square root of 28628855 is about 5350.5938922703. The cubic root of 28628855 is about 305.9153901947.

The spelling of 28628855 in words is "twenty-eight million, six hundred twenty-eight thousand, eight hundred fifty-five".