8889397638 has 32 divisors (see below), whose sum is σ = 19587094272. Its totient is φ = 2667084000.

The previous prime is 8889397567. The next prime is 8889397661. The reversal of 8889397638 is 8367939888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660106 + ... + 673437.

It is an arithmetic number, because the mean of its divisors is an integer number (612096696).

Almost surely, 2^8889397638 is an apocalyptic number.

8889397638 is an abundant number, since it is smaller than the sum of its proper divisors (10697696634).

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

8889397638 is a wasteful number, since it uses less digits than its factorization.

8889397638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333660.

The product of its digits is 125411328, while the sum is 69.

The square root of 8889397638 is about 94283.6021692001. The cubic root of 8889397638 is about 2071.5278565930.

The spelling of 8889397638 in words is "eight billion, eight hundred eighty-nine million, three hundred ninety-seven thousand, six hundred thirty-eight".