28513936 has 20 divisors (see below), whose sum is σ = 60268464. Its totient is φ = 12960800.

The previous prime is 28513921. The next prime is 28513943. The reversal of 28513936 is 63931582.

It is a junction number, because it is equal to n+sod(n) for n = 28513895 and 28513904.

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, 80830 + ... + 81181.

Almost surely, 2^28513936 is an apocalyptic number.

It is an amenable number.

28513936 is an abundant number, since it is smaller than the sum of its proper divisors (31754528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28513936 is a wasteful number, since it uses less digits than its factorization.

28513936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162030 (or 162024 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 28513936 is about 5339.8441924835. The cubic root of 28513936 is about 305.5055166005.

The spelling of 28513936 in words is "twenty-eight million, five hundred thirteen thousand, nine hundred thirty-six".