28785545 has 16 divisors (see below), whose sum is σ = 36279360. Its totient is φ = 21895104.

The previous prime is 28785541. The next prime is 28785553. The reversal of 28785545 is 54558782.

It is a cyclic number.

It is not a de Polignac number, because 28785545 - 2² = 28785541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28785496 and 28785505.

It is not an unprimeable number, because it can be changed into a prime (28785541) 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, 8234 + ... + 11196.

It is an arithmetic number, because the mean of its divisors is an integer number (2267460).

Almost surely, 2^28785545 is an apocalyptic number.

It is an amenable number.

28785545 is a deficient number, since it is larger than the sum of its proper divisors (7493815).

28785545 is a wasteful number, since it uses less digits than its factorization.

28785545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its digits is 448000, while the sum is 44.

The square root of 28785545 is about 5365.2162118595. The cubic root of 28785545 is about 306.4724819547.

The spelling of 28785545 in words is "twenty-eight million, seven hundred eighty-five thousand, five hundred forty-five".