8308620138 has 64 divisors (see below), whose sum is σ = 20570441472. Its totient is φ = 2178593280.

The previous prime is 8308620127. The next prime is 8308620163. The reversal of 8308620138 is 8310268038.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 8308620096 and 8308620105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50478 + ... + 138438.

It is an arithmetic number, because the mean of its divisors is an integer number (321413148).

Almost surely, 2^8308620138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8308620138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10285220736).

8308620138 is an abundant number, since it is smaller than the sum of its proper divisors (12261821334).

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

8308620138 is a wasteful number, since it uses less digits than its factorization.

8308620138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88159.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 8308620138 is about 91151.6326677696. The cubic root of 8308620138 is about 2025.3945388243.

The spelling of 8308620138 in words is "eight billion, three hundred eight million, six hundred twenty thousand, one hundred thirty-eight".