7638868 has 6 divisors (see below), whose sum is σ = 13368026. Its totient is φ = 3819432.

The previous prime is 7638859. The next prime is 7638877. The reversal of 7638868 is 8688367.

It is an interprime number because it is at equal distance from previous prime (7638859) and next prime (7638877).

It can be written as a sum of positive squares in only one way, i.e., 5513104 + 2125764 = 2348^2 + 1458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954855 + ... + 954862.

Almost surely, 2^7638868 is an apocalyptic number.

It is an amenable number.

7638868 is a deficient number, since it is larger than the sum of its proper divisors (5729158).

7638868 is a wasteful number, since it uses less digits than its factorization.

7638868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909721 (or 1909719 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 7638868 is about 2763.8502130181. The cubic root of 7638868 is about 196.9441122267.

The spelling of 7638868 in words is "seven million, six hundred thirty-eight thousand, eight hundred sixty-eight".