28823785 has 8 divisors (see below), whose sum is σ = 35241480. Its totient is φ = 22623744.

The previous prime is 28823783. The next prime is 28823819. The reversal of 28823785 is 58732882.

It can be written as a sum of positive squares in 4 ways, for example, as 4380649 + 24443136 = 2093^2 + 4944^2 .

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 28823785 - 2¹ = 28823783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28823783) 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, 54120 + ... + 54649.

It is an arithmetic number, because the mean of its divisors is an integer number (4405185).

Almost surely, 2^28823785 is an apocalyptic number.

It is an amenable number.

28823785 is a deficient number, since it is larger than the sum of its proper divisors (6417695).

28823785 is a wasteful number, since it uses less digits than its factorization.

28823785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108827.

The product of its digits is 215040, while the sum is 43.

The square root of 28823785 is about 5368.7787251851. The cubic root of 28823785 is about 306.6081324692.

The spelling of 28823785 in words is "twenty-eight million, eight hundred twenty-three thousand, seven hundred eighty-five".