8001390132 has 72 divisors (see below), whose sum is σ = 20551494600. Its totient is φ = 2624348160.

The previous prime is 8001390127. The next prime is 8001390139. The reversal of 8001390132 is 2310931008.

It can be written as a sum of positive squares in 4 ways, for example, as 1512120996 + 6489269136 = 38886^2 + 80556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8001390096 and 8001390105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8001390139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1176582 + ... + 1183362.

It is an arithmetic number, because the mean of its divisors is an integer number (285437425).

Almost surely, 2^8001390132 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 8001390132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10275747300).

8001390132 is an abundant number, since it is smaller than the sum of its proper divisors (12550104468).

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

8001390132 is a wasteful number, since it uses less digits than its factorization.

8001390132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313 (or 7308 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 8001390132 is about 89450.4898365571. The cubic root of 8001390132 is about 2000.1158376240.

The spelling of 8001390132 in words is "eight billion, one million, three hundred ninety thousand, one hundred thirty-two".