28858436 has 12 divisors (see below), whose sum is σ = 51111312. Its totient is φ = 14255208.

The previous prime is 28858421. The next prime is 28858439. The reversal of 28858436 is 63485882.

It is not an unprimeable number, because it can be changed into a prime (28858439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43130 + ... + 43793.

It is an arithmetic number, because the mean of its divisors is an integer number (4259276).

Almost surely, 2^28858436 is an apocalyptic number.

It is an amenable number.

28858436 is a deficient number, since it is larger than the sum of its proper divisors (22252876).

28858436 is a wasteful number, since it uses less digits than its factorization.

28858436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87010 (or 87008 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 28858436 is about 5372.0048399085. The cubic root of 28858436 is about 306.7309479825.

The spelling of 28858436 in words is "twenty-eight million, eight hundred fifty-eight thousand, four hundred thirty-six".