28043136 has 96 divisors (see below), whose sum is σ = 88072920. Its totient is φ = 8494080.

The previous prime is 28043131. The next prime is 28043153. The reversal of 28043136 is 63134082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×28043136³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043131) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11566 + ... + 13778.

Almost surely, 2^28043136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28043136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44036460).

28043136 is an abundant number, since it is smaller than the sum of its proper divisors (60029784).

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

28043136 is a wasteful number, since it uses less digits than its factorization.

28043136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28043136 is about 5295.5770223839. The cubic root of 28043136 is about 303.8147532528.

The spelling of 28043136 in words is "twenty-eight million, forty-three thousand, one hundred thirty-six".