7938644 has 24 divisors (see below), whose sum is σ = 15960000. Its totient is φ = 3384576.

The previous prime is 7938641. The next prime is 7938649. The reversal of 7938644 is 4468397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7938641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (665000).

Almost surely, 2^7938644 is an apocalyptic number.

It is an amenable number.

7938644 is an abundant number, since it is smaller than the sum of its proper divisors (8021356).

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

7938644 is a wasteful number, since it uses less digits than its factorization.

7938644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 7938644 is about 2817.5599372507. The cubic root of 7938644 is about 199.4873872634.

The spelling of 7938644 in words is "seven million, nine hundred thirty-eight thousand, six hundred forty-four".