7918644 has 24 divisors (see below), whose sum is σ = 18712960. Its totient is φ = 2605824.

The previous prime is 7918643. The next prime is 7918657. The reversal of 7918644 is 4468197.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7918643) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3229 + ... + 5124.

Almost surely, 2^7918644 is an apocalyptic number.

It is an amenable number.

7918644 is an abundant number, since it is smaller than the sum of its proper divisors (10794316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7918644 is a wasteful number, since it uses less digits than its factorization.

7918644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8439 (or 8437 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 7918644 is about 2814.0085287717. The cubic root of 7918644 is about 199.3197220665.

The spelling of 7918644 in words is "seven million, nine hundred eighteen thousand, six hundred forty-four".