28305036 has 18 divisors (see below), whose sum is σ = 71548932. Its totient is φ = 9435000.

The previous prime is 28305029. The next prime is 28305061. The reversal of 28305036 is 63050382.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28305036² = 1602350125922592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393090 + ... + 393161.

Almost surely, 2^28305036 is an apocalyptic number.

It is an amenable number.

28305036 is an abundant number, since it is smaller than the sum of its proper divisors (43243896).

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

28305036 is a wasteful number, since it uses less digits than its factorization.

28305036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786261 (or 786256 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 28305036 is about 5320.2477385926. The cubic root of 28305036 is about 304.7576180557.

It can be divided in two parts, 2 and 8305036, that added together give a palindrome (8305038).

The spelling of 28305036 in words is "twenty-eight million, three hundred five thousand, thirty-six".