28375785 has 16 divisors (see below), whose sum is σ = 50446080. Its totient is φ = 15133680.

The previous prime is 28375783. The next prime is 28375793. The reversal of 28375785 is 58757382.

It is not a de Polignac number, because 28375785 - 2¹ = 28375783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28375785.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28375783) 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, 104961 + ... + 105230.

It is an arithmetic number, because the mean of its divisors is an integer number (3152880).

Almost surely, 2^28375785 is an apocalyptic number.

It is an amenable number.

28375785 is a deficient number, since it is larger than the sum of its proper divisors (22070295).

28375785 is a wasteful number, since it uses less digits than its factorization.

28375785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210205 (or 210199 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 28375785 is about 5326.8926214070. The cubic root of 28375785 is about 305.0113227007.

The spelling of 28375785 in words is "twenty-eight million, three hundred seventy-five thousand, seven hundred eighty-five".