28234518 has 64 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 8059392.

The previous prime is 28234517. The next prime is 28234529. The reversal of 28234518 is 81543282.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28234511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141783 + ... + 141981.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^28234518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28234518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

28234518 is an abundant number, since it is smaller than the sum of its proper divisors (37083882).

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

28234518 is a wasteful number, since it uses less digits than its factorization.

28234518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its digits is 15360, while the sum is 33.

The square root of 28234518 is about 5313.6162827212. The cubic root of 28234518 is about 304.5043207316.

The spelling of 28234518 in words is "twenty-eight million, two hundred thirty-four thousand, five hundred eighteen".