7440028 has 6 divisors (see below), whose sum is σ = 13020056. Its totient is φ = 3720012.

The previous prime is 7440011. The next prime is 7440047. The reversal of 7440028 is 8200447.

It is a junction number, because it is equal to n+sod(n) for n = 7439984 and 7440011.

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, 930000 + ... + 930007.

Almost surely, 2^7440028 is an apocalyptic number.

It is an amenable number.

7440028 is a deficient number, since it is larger than the sum of its proper divisors (5580028).

7440028 is a wasteful number, since it uses less digits than its factorization.

7440028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860011 (or 1860009 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 7440028 is about 2727.6414720414. The cubic root of 7440028 is about 195.2202464330.

The spelling of 7440028 in words is "seven million, four hundred forty thousand, twenty-eight".