8818640442 has 12 divisors (see below), whose sum is σ = 19107054330. Its totient is φ = 2939546808.

The previous prime is 8818640437. The next prime is 8818640447. The reversal of 8818640442 is 2440468188.

It is an interprime number because it is at equal distance from previous prime (8818640437) and next prime (8818640447).

It can be written as a sum of positive squares in only one way, i.e., 8753660721 + 64979721 = 93561^2 + 8061^2 .

It is not an unprimeable number, because it can be changed into a prime (8818640447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244962217 + ... + 244962252.

Almost surely, 2^8818640442 is an apocalyptic number.

8818640442 is an abundant number, since it is smaller than the sum of its proper divisors (10288413888).

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

8818640442 is a wasteful number, since it uses less digits than its factorization.

8818640442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489924477 (or 489924474 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The square root of 8818640442 is about 93907.6165281603. The cubic root of 8818640442 is about 2066.0169420593.

The spelling of 8818640442 in words is "eight billion, eight hundred eighteen million, six hundred forty thousand, four hundred forty-two".