28555005 has 16 divisors (see below), whose sum is σ = 48093120. Its totient is φ = 14427648.

The previous prime is 28554979. The next prime is 28555049. The reversal of 28555005 is 50055582.

It is not a de Polignac number, because 28555005 - 2⁵ = 28554973 is a prime.

It is a congruent number.

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, 49812 + ... + 50381.

It is an arithmetic number, because the mean of its divisors is an integer number (3005820).

Almost surely, 2^28555005 is an apocalyptic number.

It is an amenable number.

28555005 is a deficient number, since it is larger than the sum of its proper divisors (19538115).

28555005 is a wasteful number, since it uses less digits than its factorization.

28555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100220.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 28555005 is about 5343.6883329775. The cubic root of 28555005 is about 305.6521207861.

The spelling of 28555005 in words is "twenty-eight million, five hundred fifty-five thousand, five".