2331728 has 40 divisors (see below), whose sum is σ = 5237760. Its totient is φ = 984960.

The previous prime is 2331697. The next prime is 2331733. The reversal of 2331728 is 8271332.

It is a Cunningham number, because it is equal to 1527²-1.

It is a junction number, because it is equal to n+sod(n) for n = 2331697 and 2331706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12113 + ... + 12303.

It is an arithmetic number, because the mean of its divisors is an integer number (130944).

2^2331728 is an apocalyptic number.

2331728 is a gapful number since it is divisible by the number (28) 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 2331728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2618880).

2331728 is an abundant number, since it is smaller than the sum of its proper divisors (2906032).

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

2331728 is a wasteful number, since it uses less digits than its factorization.

2331728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 309 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 2331728 is about 1526.9996725605. Note that the first 3 decimals coincide. The cubic root of 2331728 is about 132.6048156030.

The spelling of 2331728 in words is "two million, three hundred thirty-one thousand, seven hundred twenty-eight".