2438721 has 16 divisors (see below), whose sum is σ = 3702720. Its totient is φ = 1585440.

The previous prime is 2438717. The next prime is 2438767. The reversal of 2438721 is 1278342.

It is not a de Polignac number, because 2438721 - 2² = 2438717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2438791) 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, 6 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (231420).

2^2438721 is an apocalyptic number.

It is an amenable number.

2438721 is a deficient number, since it is larger than the sum of its proper divisors (1263999).

2438721 is a wasteful number, since it uses less digits than its factorization.

2438721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253 (or 2247 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2438721 is about 1561.6404835941. The cubic root of 2438721 is about 134.6027830129.

The spelling of 2438721 in words is "two million, four hundred thirty-eight thousand, seven hundred twenty-one".