28753857 has 12 divisors (see below), whose sum is σ = 45309264. Its totient is φ = 17426520.

The previous prime is 28753849. The next prime is 28753861. The reversal of 28753857 is 75835782.

It is not a de Polignac number, because 28753857 - 2³ = 28753849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28753057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145123 + ... + 145320.

It is an arithmetic number, because the mean of its divisors is an integer number (3775772).

Almost surely, 2^28753857 is an apocalyptic number.

It is an amenable number.

28753857 is a deficient number, since it is larger than the sum of its proper divisors (16555407).

28753857 is a wasteful number, since it uses less digits than its factorization.

28753857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290460 (or 290457 counting only the distinct ones).

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

The square root of 28753857 is about 5362.2623024242. The cubic root of 28753857 is about 306.3599825995.

The spelling of 28753857 in words is "twenty-eight million, seven hundred fifty-three thousand, eight hundred fifty-seven".