7440889 has 4 divisors (see below), whose sum is σ = 7447924. Its totient is φ = 7433856.

The previous prime is 7440869. The next prime is 7440893. The reversal of 7440889 is 9880447.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 3579664 = 1965^2 + 1892^2 .

It is a cyclic number.

It is not a de Polignac number, because 7440889 - 2⁵ = 7440857 is a prime.

It is a super-2 number, since 2×7440889² = 110733658220642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7440859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572 + ... + 4165.

It is an arithmetic number, because the mean of its divisors is an integer number (1861981).

Almost surely, 2^7440889 is an apocalyptic number.

It is an amenable number.

7440889 is a deficient number, since it is larger than the sum of its proper divisors (7035).

7440889 is a wasteful number, since it uses less digits than its factorization.

7440889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 7440889 is about 2727.7992961360. The cubic root of 7440889 is about 195.2277767877.

It can be divided in two parts, 7 and 440889, that added together give a square (440896 = 664²).

The spelling of 7440889 in words is "seven million, four hundred forty thousand, eight hundred eighty-nine".