8640888890 has 16 divisors (see below), whose sum is σ = 15696295560. Its totient is φ = 3424645440.

The previous prime is 8640888863. The next prime is 8640888917. The reversal of 8640888890 is 988880468.

It is an interprime number because it is at equal distance from previous prime (8640888863) and next prime (8640888917).

It can be written as a sum of positive squares in 4 ways, for example, as 6452426929 + 2188461961 = 80327^2 + 46781^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3962621 + ... + 3964800.

Almost surely, 2^8640888890 is an apocalyptic number.

8640888890 is a deficient number, since it is larger than the sum of its proper divisors (7055406670).

8640888890 is a wasteful number, since it uses less digits than its factorization.

8640888890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7927537.

The product of its (nonzero) digits is 7077888, while the sum is 59.

The square root of 8640888890 is about 92956.3816529021. The cubic root of 8640888890 is about 2052.0415030674.

The spelling of 8640888890 in words is "eight billion, six hundred forty million, eight hundred eighty-eight thousand, eight hundred ninety".