7955638 has 4 divisors (see below), whose sum is σ = 11933460. Its totient is φ = 3977818.

The previous prime is 7955627. The next prime is 7955639. The reversal of 7955638 is 8365597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8365597 = 2467 ⋅3391.

It is a junction number, because it is equal to n+sod(n) for n = 7955594 and 7955603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7955639) 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, 1988908 + ... + 1988911.

It is an arithmetic number, because the mean of its divisors is an integer number (2983365).

Almost surely, 2^7955638 is an apocalyptic number.

7955638 is a deficient number, since it is larger than the sum of its proper divisors (3977822).

7955638 is a wasteful number, since it uses less digits than its factorization.

7955638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977821.

The product of its digits is 226800, while the sum is 43.

The square root of 7955638 is about 2820.5740550462. The cubic root of 7955638 is about 199.6296312249.

The spelling of 7955638 in words is "seven million, nine hundred fifty-five thousand, six hundred thirty-eight".