28715436 has 36 divisors (see below), whose sum is σ = 72773064. Its totient is φ = 9547200.

The previous prime is 28715419. The next prime is 28715437. The reversal of 28715436 is 63451782.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28715436.

It is not an unprimeable number, because it can be changed into a prime (28715437) 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, 17991 + ... + 19521.

It is an arithmetic number, because the mean of its divisors is an integer number (2021474).

Almost surely, 2^28715436 is an apocalyptic number.

It is an amenable number.

28715436 is an abundant number, since it is smaller than the sum of its proper divisors (44057628).

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

28715436 is a wasteful number, since it uses less digits than its factorization.

28715436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2057 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28715436 is about 5358.6785684532. The cubic root of 28715436 is about 306.2234686998.

The spelling of 28715436 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred thirty-six".