8000145640 has 32 divisors (see below), whose sum is σ = 18002880000. Its totient is φ = 3199604544.

The previous prime is 8000145631. The next prime is 8000145641. The reversal of 8000145640 is 465410008.

It is a super-2 number, since 2×8000145640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8000145599 and 8000145608.

It is not an unprimeable number, because it can be changed into a prime (8000145641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518761 + ... + 533959.

It is an arithmetic number, because the mean of its divisors is an integer number (562590000).

Almost surely, 2^8000145640 is an apocalyptic number.

It is an amenable number.

8000145640 is an abundant number, since it is smaller than the sum of its proper divisors (10002734360).

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

8000145640 is a wasteful number, since it uses less digits than its factorization.

8000145640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28369 (or 28365 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 8000145640 is about 89443.5332486368. The cubic root of 8000145640 is about 2000.0121365930.

Adding to 8000145640 its reverse (465410008), we get a palindrome (8465555648).

The spelling of 8000145640 in words is "eight billion, one hundred forty-five thousand, six hundred forty".