28956705 has 8 divisors (see below), whose sum is σ = 46330752. Its totient is φ = 15443568.

The previous prime is 28956679. The next prime is 28956721. The reversal of 28956705 is 50765982.

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

It is not a de Polignac number, because 28956705 - 2¹⁰ = 28955681 is a prime.

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, 965209 + ... + 965238.

It is an arithmetic number, because the mean of its divisors is an integer number (5791344).

Almost surely, 2^28956705 is an apocalyptic number.

It is an amenable number.

28956705 is a deficient number, since it is larger than the sum of its proper divisors (17374047).

28956705 is a wasteful number, since it uses less digits than its factorization.

28956705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930455.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 28956705 is about 5381.1434658444. The cubic root of 28956705 is about 307.0787145152.

The spelling of 28956705 in words is "twenty-eight million, nine hundred fifty-six thousand, seven hundred five".