8018638 has 4 divisors (see below), whose sum is σ = 12027960. Its totient is φ = 4009318.

The previous prime is 8018629. The next prime is 8018639. The reversal of 8018638 is 8368108.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8018639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2004658 + ... + 2004661.

It is an arithmetic number, because the mean of its divisors is an integer number (3006990).

Almost surely, 2^8018638 is an apocalyptic number.

8018638 is a deficient number, since it is larger than the sum of its proper divisors (4009322).

8018638 is a wasteful number, since it uses less digits than its factorization.

8018638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009321.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 8018638 is about 2831.7199720311. The cubic root of 8018638 is about 200.1551962062.

The spelling of 8018638 in words is "eight million, eighteen thousand, six hundred thirty-eight".