28734 has 8 divisors (see below), whose sum is σ = 57480. Its totient is φ = 9576.

The previous prime is 28729. The next prime is 28751. The reversal of 28734 is 43782.

It is a sphenic number, since it is the product of 3 distinct primes.

28734 is an admirable number.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 8³ + 7³ + 3⁹ + 4 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2389 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (7185).

2²⁸⁷³⁴ is an apocalyptic number.

28734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28740).

28734 is a wasteful number, since it uses less digits than its factorization.

28734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794.

The product of its digits is 1344, while the sum is 24.

The square root of 28734 is about 169.5110615860. The cubic root of 28734 is about 30.6289443760.

The spelling of 28734 in words is "twenty-eight thousand, seven hundred thirty-four".