7947944 has 8 divisors (see below), whose sum is σ = 14902410. Its totient is φ = 3973968.

The previous prime is 7947941. The next prime is 7947971. The reversal of 7947944 is 4497497.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 925444 = 2650^2 + 962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 7947895 and 7947904.

It is not an unprimeable number, because it can be changed into a prime (7947941) 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 as a sum of consecutive naturals, namely, 496739 + ... + 496754.

Almost surely, 2^7947944 is an apocalyptic number.

It is an amenable number.

7947944 is a deficient number, since it is larger than the sum of its proper divisors (6954466).

7947944 is a wasteful number, since it uses less digits than its factorization.

7947944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993499 (or 993495 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 7947944 is about 2819.2098183711. The cubic root of 7947944 is about 199.5652556716.

The spelling of 7947944 in words is "seven million, nine hundred forty-seven thousand, nine hundred forty-four".