8139447000 has 640 divisors, whose sum is σ = 31557651840. Its totient is φ = 1946419200.

The previous prime is 8139446969. The next prime is 8139447037. The reversal of 8139447000 is 7449318.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 31670872 + ... + 31671128.

It is an arithmetic number, because the mean of its divisors is an integer number (49308831).

Almost surely, 2^8139447000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8139447000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15778825920).

8139447000 is an abundant number, since it is smaller than the sum of its proper divisors (23418204840).

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

8139447000 is a wasteful number, since it uses less digits than its factorization.

8139447000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8139447000 is about 90218.8838325990. The cubic root of 8139447000 is about 2011.5537106942.

The spelling of 8139447000 in words is "eight billion, one hundred thirty-nine million, four hundred forty-seven thousand".