7640044 has 12 divisors (see below), whose sum is σ = 13503168. Its totient is φ = 3782000.

The previous prime is 7640029. The next prime is 7640047. The reversal of 7640044 is 4400467.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7640047) 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, 9052 + ... + 9859.

It is an arithmetic number, because the mean of its divisors is an integer number (1125264).

Almost surely, 2^7640044 is an apocalyptic number.

It is an amenable number.

7640044 is a deficient number, since it is larger than the sum of its proper divisors (5863124).

7640044 is a wasteful number, since it uses less digits than its factorization.

7640044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19016 (or 19014 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7640044 is about 2764.0629515262. The cubic root of 7640044 is about 196.9542181914.

The spelling of 7640044 in words is "seven million, six hundred forty thousand, forty-four".