28193936 has 20 divisors (see below), whose sum is σ = 54734592. Its totient is φ = 14068896.

The previous prime is 28193927. The next prime is 28193941. The reversal of 28193936 is 63939182.

It is a junction number, because it is equal to n+sod(n) for n = 28193893 and 28193902.

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, 8261 + ... + 11163.

Almost surely, 2^28193936 is an apocalyptic number.

It is an amenable number.

28193936 is a deficient number, since it is larger than the sum of its proper divisors (26540656).

28193936 is a wasteful number, since it uses less digits than its factorization.

28193936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3512 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 28193936 is about 5309.7962296118. The cubic root of 28193936 is about 304.3583608634.

The spelling of 28193936 in words is "twenty-eight million, one hundred ninety-three thousand, nine hundred thirty-six".