28132338 has 32 divisors (see below), whose sum is σ = 61209792. Its totient is φ = 8568000.

The previous prime is 28132309. The next prime is 28132339. The reversal of 28132338 is 83323182.

It is not an unprimeable number, because it can be changed into a prime (28132339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6093 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (1912806).

Almost surely, 2^28132338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28132338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30604896).

28132338 is an abundant number, since it is smaller than the sum of its proper divisors (33077454).

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

28132338 is a wasteful number, since it uses less digits than its factorization.

28132338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690.

The product of its digits is 6912, while the sum is 30.

The square root of 28132338 is about 5303.9926470537. The cubic root of 28132338 is about 304.1365455963.

It can be divided in two parts, 2813 and 2338, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 28132338 in words is "twenty-eight million, one hundred thirty-two thousand, three hundred thirty-eight".