28005036 has 24 divisors (see below), whose sum is σ = 65533440. Its totient is φ = 9308112.

The previous prime is 28005023. The next prime is 28005073. The reversal of 28005036 is 63050082.

It is a super-2 number, since 2×28005036² = 1568564082722592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28004997 and 28005015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (2730560).

Almost surely, 2^28005036 is an apocalyptic number.

It is an amenable number.

28005036 is an abundant number, since it is smaller than the sum of its proper divisors (37528404).

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

28005036 is a wasteful number, since it uses less digits than its factorization.

28005036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733 (or 6731 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28005036 is about 5291.9784580060. The cubic root of 28005036 is about 303.6771011701.

The spelling of 28005036 in words is "twenty-eight million, five thousand, thirty-six".