28695915947 has 16 divisors (see below), whose sum is σ = 30110907840. Its totient is φ = 27309768192.

The previous prime is 28695915931. The next prime is 28695915953. The reversal of 28695915947 is 74951959682.

It is a cyclic number.

It is not a de Polignac number, because 28695915947 - 2⁴ = 28695915931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28695915907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4520858 + ... + 4527200.

It is an arithmetic number, because the mean of its divisors is an integer number (1881931740).

Almost surely, 2^28695915947 is an apocalyptic number.

28695915947 is a deficient number, since it is larger than the sum of its proper divisors (1414991893).

28695915947 is a wasteful number, since it uses less digits than its factorization.

28695915947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582.

The product of its digits is 48988800, while the sum is 65.

The spelling of 28695915947 in words is "twenty-eight billion, six hundred ninety-five million, nine hundred fifteen thousand, nine hundred forty-seven".