28857032 has 16 divisors (see below), whose sum is σ = 55852800. Its totient is φ = 13962960.

The previous prime is 28856983. The next prime is 28857047. The reversal of 28857032 is 23075882.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28856983 and 28857001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57932 + ... + 58427.

It is an arithmetic number, because the mean of its divisors is an integer number (3490800).

Almost surely, 2^28857032 is an apocalyptic number.

It is an amenable number.

28857032 is a deficient number, since it is larger than the sum of its proper divisors (26995768).

28857032 is a wasteful number, since it uses less digits than its factorization.

28857032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116396 (or 116392 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28857032 is about 5371.8741608493. The cubic root of 28857032 is about 306.7259736169.

The spelling of 28857032 in words is "twenty-eight million, eight hundred fifty-seven thousand, thirty-two".