28857735 has 32 divisors (see below), whose sum is σ = 51629760. Its totient is φ = 15292800.

The previous prime is 28857733. The next prime is 28857739. The reversal of 28857735 is 53775882.

It is not a de Polignac number, because 28857735 - 2¹ = 28857733 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23845 + ... + 25025.

It is an arithmetic number, because the mean of its divisors is an integer number (1613430).

Almost surely, 2^28857735 is an apocalyptic number.

28857735 is a deficient number, since it is larger than the sum of its proper divisors (22772025).

28857735 is a wasteful number, since it uses less digits than its factorization.

28857735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376 (or 1370 counting only the distinct ones).

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

The square root of 28857735 is about 5371.9395938525. The cubic root of 28857735 is about 306.7284643629.

It can be divided in two parts, 28857 and 735, that added together give a palindrome (29592).

The spelling of 28857735 in words is "twenty-eight million, eight hundred fifty-seven thousand, seven hundred thirty-five".