28032856 has 8 divisors (see below), whose sum is σ = 52561620. Its totient is φ = 14016424.

The previous prime is 28032839. The next prime is 28032857. The reversal of 28032856 is 65823082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1752046 + ... + 1752061.

Almost surely, 2^28032856 is an apocalyptic number.

It is an amenable number.

28032856 is a deficient number, since it is larger than the sum of its proper divisors (24528764).

28032856 is a wasteful number, since it uses less digits than its factorization.

28032856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504113 (or 3504109 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28032856 is about 5294.6063120878. The cubic root of 28032856 is about 303.7776247689. Note that the first 3 decimals are identical.

The spelling of 28032856 in words is "twenty-eight million, thirty-two thousand, eight hundred fifty-six".