28134744 has 128 divisors (see below), whose sum is σ = 82944000. Its totient is φ = 7862400.

The previous prime is 28134737. The next prime is 28134751. The reversal of 28134744 is 44743182.

It is an interprime number because it is at equal distance from previous prime (28134737) and next prime (28134751).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 356097 + ... + 356175.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^28134744 is an apocalyptic number.

28134744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28134744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41472000).

28134744 is an abundant number, since it is smaller than the sum of its proper divisors (54809256).

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

28134744 is a wasteful number, since it uses less digits than its factorization.

28134744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 185 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 28134744 is about 5304.2194524737. The cubic root of 28134744 is about 304.1452157096.

It can be divided in two parts, 2813 and 4744, that added together give a palindrome (7557).

The spelling of 28134744 in words is "twenty-eight million, one hundred thirty-four thousand, seven hundred forty-four".