7648638 has 8 divisors (see below), whose sum is σ = 15297288. Its totient is φ = 2549544.

The previous prime is 7648637. The next prime is 7648643. The reversal of 7648638 is 8368467.

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

7648638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 7648638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637381 + ... + 637392.

It is an arithmetic number, because the mean of its divisors is an integer number (1912161).

Almost surely, 2^7648638 is an apocalyptic number.

7648638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7648638 is a wasteful number, since it uses less digits than its factorization.

7648638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274778.

The product of its digits is 193536, while the sum is 42.

The square root of 7648638 is about 2765.6171101582. The cubic root of 7648638 is about 197.0280393322.

The spelling of 7648638 in words is "seven million, six hundred forty-eight thousand, six hundred thirty-eight".