8000040440 has 64 divisors (see below), whose sum is σ = 21654259200. Its totient is φ = 2598507648.

The previous prime is 8000040403. The next prime is 8000040457. The reversal of 8000040440 is 440400008.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 746564 + ... + 757203.

It is an arithmetic number, because the mean of its divisors is an integer number (338347800).

Almost surely, 2^8000040440 is an apocalyptic number.

It is an amenable number.

8000040440 is an abundant number, since it is smaller than the sum of its proper divisors (13654218760).

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

8000040440 is a wasteful number, since it uses less digits than its factorization.

8000040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503804 (or 1503800 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 8000040440 is about 89442.9451661784. The cubic root of 8000040440 is about 2000.0033699943.

Adding to 8000040440 its reverse (440400008), we get a palindrome (8440440448).

The spelling of 8000040440 in words is "eight billion, forty thousand, four hundred forty".