28935569 has 8 divisors (see below), whose sum is σ = 31205160. Its totient is φ = 26672256.

The previous prime is 28935559. The next prime is 28935601. The reversal of 28935569 is 96553982.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 23814400 = 2263^2 + 4880^2 .

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

It is not a de Polignac number, because 28935569 - 2¹⁶ = 28870033 is a prime.

It is a super-2 number, since 2×28935569² = 1674534306707522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28935539) 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, 13247 + ... + 15275.

It is an arithmetic number, because the mean of its divisors is an integer number (3900645).

Almost surely, 2^28935569 is an apocalyptic number.

It is an amenable number.

28935569 is a deficient number, since it is larger than the sum of its proper divisors (2269591).

28935569 is a wasteful number, since it uses less digits than its factorization.

28935569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139.

The product of its digits is 583200, while the sum is 47.

The square root of 28935569 is about 5379.1792124821. The cubic root of 28935569 is about 307.0039823071.

The spelling of 28935569 in words is "twenty-eight million, nine hundred thirty-five thousand, five hundred sixty-nine".