28910555 has 16 divisors (see below), whose sum is σ = 35555520. Its totient is φ = 22560768.

The previous prime is 28910509. The next prime is 28910573. The reversal of 28910555 is 55501982.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28910555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37211 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (2222220).

Almost surely, 2^28910555 is an apocalyptic number.

28910555 is a deficient number, since it is larger than the sum of its proper divisors (6644965).

28910555 is a wasteful number, since it uses less digits than its factorization.

28910555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 28910555 is about 5376.8536338643. The cubic root of 28910555 is about 306.9154913158.

The spelling of 28910555 in words is "twenty-eight million, nine hundred ten thousand, five hundred fifty-five".