28960705 has 8 divisors (see below), whose sum is σ = 35951400. Its totient is φ = 22369536.

The previous prime is 28960697. The next prime is 28960709. The reversal of 28960705 is 50706982.

28960705 = T₂₉₄ + T₂₉₅ + ... + T₅₈₃.

It can be written as a sum of positive squares in 4 ways, for example, as 732736 + 28227969 = 856^2 + 5313^2 .

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 28960705 - 2³ = 28960697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28960709) 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, 99720 + ... + 100009.

It is an arithmetic number, because the mean of its divisors is an integer number (4493925).

Almost surely, 2^28960705 is an apocalyptic number.

It is an amenable number.

28960705 is a deficient number, since it is larger than the sum of its proper divisors (6990695).

28960705 is a wasteful number, since it uses less digits than its factorization.

28960705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199763.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 28960705 is about 5381.5151212275. The cubic root of 28960705 is about 307.0928535353.

The spelling of 28960705 in words is "twenty-eight million, nine hundred sixty thousand, seven hundred five".