28008655 has 8 divisors (see below), whose sum is σ = 34694784. Its totient is φ = 21684000.

The previous prime is 28008637. The next prime is 28008661. The reversal of 28008655 is 55680082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28008655 - 2¹³ = 28000463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28008655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90196 + ... + 90505.

It is an arithmetic number, because the mean of its divisors is an integer number (4336848).

Almost surely, 2^28008655 is an apocalyptic number.

28008655 is a deficient number, since it is larger than the sum of its proper divisors (6686129).

28008655 is a wasteful number, since it uses less digits than its factorization.

28008655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180737.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 28008655 is about 5292.3203795689. The cubic root of 28008655 is about 303.6901816757.

The spelling of 28008655 in words is "twenty-eight million, eight thousand, six hundred fifty-five".