28912536 has 96 divisors (see below), whose sum is σ = 82695600. Its totient is φ = 9112320.

The previous prime is 28912531. The next prime is 28912571. The reversal of 28912536 is 63521982.

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 28912536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28912531) 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 23 ways as a sum of consecutive naturals, for example, 127255 + ... + 127481.

Almost surely, 2^28912536 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 28912536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41347800).

28912536 is an abundant number, since it is smaller than the sum of its proper divisors (53783064).

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

28912536 is a wasteful number, since it uses less digits than its factorization.

28912536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 322 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28912536 is about 5377.0378462496. The cubic root of 28912536 is about 306.9225012781.

The spelling of 28912536 in words is "twenty-eight million, nine hundred twelve thousand, five hundred thirty-six".