2391728 has 20 divisors (see below), whose sum is σ = 4692408. Its totient is φ = 1180800.

The previous prime is 2391721. The next prime is 2391733. The reversal of 2391728 is 8271932.

2391728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2391694 and 2391703.

It is not an unprimeable number, because it can be changed into a prime (2391721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428 + ... + 2228.

2^2391728 is an apocalyptic number.

It is an amenable number.

2391728 is a deficient number, since it is larger than the sum of its proper divisors (2300680).

2391728 is a wasteful number, since it uses less digits than its factorization.

2391728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892 (or 1886 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 2391728 is about 1546.5212575325. The cubic root of 2391728 is about 133.7325921386.

The spelling of 2391728 in words is "two million, three hundred ninety-one thousand, seven hundred twenty-eight".