7625638 has 4 divisors (see below), whose sum is σ = 11438460. Its totient is φ = 3812818.

The previous prime is 7625621. The next prime is 7625677. The reversal of 7625638 is 8365267.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8365267 = 131 ⋅63857.

It is a junction number, because it is equal to n+sod(n) for n = 7625597 and 7625606.

It is a congruent number.

It is an unprimeable number.

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, 1906408 + ... + 1906411.

It is an arithmetic number, because the mean of its divisors is an integer number (2859615).

Almost surely, 2^7625638 is an apocalyptic number.

7625638 is a deficient number, since it is larger than the sum of its proper divisors (3812822).

7625638 is a wasteful number, since it uses less digits than its factorization.

7625638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812821.

The product of its digits is 60480, while the sum is 37.

The square root of 7625638 is about 2761.4557754923. The cubic root of 7625638 is about 196.8303485872.

It can be divided in two parts, 762 and 5638, that added together give a square (6400 = 80²).

The spelling of 7625638 in words is "seven million, six hundred twenty-five thousand, six hundred thirty-eight".