28705895 has 8 divisors (see below), whose sum is σ = 35378304. Its totient is φ = 22343904.

The previous prime is 28705891. The next prime is 28705921. The reversal of 28705895 is 59850782.

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 28705895 - 2² = 28705891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77399 + ... + 77768.

It is an arithmetic number, because the mean of its divisors is an integer number (4422288).

Almost surely, 2^28705895 is an apocalyptic number.

28705895 is a deficient number, since it is larger than the sum of its proper divisors (6672409).

28705895 is a wasteful number, since it uses less digits than its factorization.

28705895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155209.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 28705895 is about 5357.7882563610. The cubic root of 28705895 is about 306.1895496401.

The spelling of 28705895 in words is "twenty-eight million, seven hundred five thousand, eight hundred ninety-five".