28734912 has 140 divisors (see below), whose sum is σ = 89251536. Its totient is φ = 9123840.

The previous prime is 28734887. The next prime is 28734919. The reversal of 28734912 is 21943782.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

Its product of digits (24192) is a multiple of the sum of its prime factors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28734919) 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 19 ways as a sum of consecutive naturals, for example, 119112 + ... + 119352.

Almost surely, 2^28734912 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 28734912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44625768).

28734912 is an abundant number, since it is smaller than the sum of its proper divisors (60516624).

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

28734912 is a wasteful number, since it uses less digits than its factorization.

28734912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 269 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28734912 is about 5360.4954994851. The cubic root of 28734912 is about 306.2926842074.

It can be divided in two parts, 28734 and 912, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28734912 in words is "twenty-eight million, seven hundred thirty-four thousand, nine hundred twelve".