2421728 has 12 divisors (see below), whose sum is σ = 4767840. Its totient is φ = 1210848.

The previous prime is 2421707. The next prime is 2421733. The reversal of 2421728 is 8271242.

2421728 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 = 2421697 and 2421706.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 37808 + ... + 37871.

It is an arithmetic number, because the mean of its divisors is an integer number (397320).

2^2421728 is an apocalyptic number.

It is an amenable number.

2421728 is a deficient number, since it is larger than the sum of its proper divisors (2346112).

2421728 is an equidigital number, since it uses as much as digits as its factorization.

2421728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75689 (or 75681 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 2421728 is about 1556.1902197354. The cubic root of 2421728 is about 134.2894167855.

The spelling of 2421728 in words is "two million, four hundred twenty-one thousand, seven hundred twenty-eight".