7944436 has 6 divisors (see below), whose sum is σ = 13902770. Its totient is φ = 3972216.

The previous prime is 7944373. The next prime is 7944437. The reversal of 7944436 is 6344497.

It can be written as a sum of positive squares in only one way, i.e., 4024036 + 3920400 = 2006^2 + 1980^2 .

It is a super-2 number, since 2×7944436² = 126228126716192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7944395 and 7944404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944437) 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 as a sum of consecutive naturals, namely, 993051 + ... + 993058.

Almost surely, 2^7944436 is an apocalyptic number.

It is an amenable number.

7944436 is a deficient number, since it is larger than the sum of its proper divisors (5958334).

7944436 is a wasteful number, since it uses less digits than its factorization.

7944436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986113 (or 1986111 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 7944436 is about 2818.5875895562. The cubic root of 7944436 is about 199.5358905116.

The spelling of 7944436 in words is "seven million, nine hundred forty-four thousand, four hundred thirty-six".