28643336 has 16 divisors (see below), whose sum is σ = 56533200. Its totient is φ = 13567824.

The previous prime is 28643311. The next prime is 28643357. The reversal of 28643336 is 63334682.

It is a junction number, because it is equal to n+sod(n) for n = 28643296 and 28643305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94070 + ... + 94373.

It is an arithmetic number, because the mean of its divisors is an integer number (3533325).

Almost surely, 2^28643336 is an apocalyptic number.

It is an amenable number.

28643336 is a deficient number, since it is larger than the sum of its proper divisors (27889864).

28643336 is a wasteful number, since it uses less digits than its factorization.

28643336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188468 (or 188464 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 28643336 is about 5351.9469354619. The cubic root of 28643336 is about 305.9669607058.

The spelling of 28643336 in words is "twenty-eight million, six hundred forty-three thousand, three hundred thirty-six".