7947938 has 8 divisors (see below), whose sum is σ = 11941020. Its totient is φ = 3967600.

The previous prime is 7947937. The next prime is 7947941. The reversal of 7947938 is 8397497.

It can be written as a sum of positive squares in 2 ways, for example, as 7912969 + 34969 = 2813^2 + 187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7947892 and 7947901.

It is not an unprimeable number, because it can be changed into a prime (7947931) 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 3 ways as a sum of consecutive naturals, for example, 1433 + ... + 4236.

Almost surely, 2^7947938 is an apocalyptic number.

7947938 is a deficient number, since it is larger than the sum of its proper divisors (3993082).

7947938 is a wasteful number, since it uses less digits than its factorization.

7947938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372.

The product of its digits is 381024, while the sum is 47.

The square root of 7947938 is about 2819.2087542429. The cubic root of 7947938 is about 199.5652054535.

The spelling of 7947938 in words is "seven million, nine hundred forty-seven thousand, nine hundred thirty-eight".