80000400040 has 32 divisors (see below), whose sum is σ = 196364619360. Its totient is φ = 29091054400.

The previous prime is 80000400023. The next prime is 80000400041. The reversal of 80000400040 is 4000400008.

80000400040 is a modest number, since divided by 400040 gives 800 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 80000399987 and 80000400023.

It is not an unprimeable number, because it can be changed into a prime (80000400041) 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, 90909106 + ... + 90909985.

It is an arithmetic number, because the mean of its divisors is an integer number (6136394355).

Almost surely, 2^80000400040 is an apocalyptic number.

It is an amenable number.

80000400040 is an abundant number, since it is smaller than the sum of its proper divisors (116364219320).

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

80000400040 is a wasteful number, since it uses less digits than its factorization.

80000400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181819113 (or 181819109 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 80000400040 its reverse (4000400008), we get a palindrome (84000800048).

The spelling of 80000400040 in words is "eighty billion, four hundred thousand, forty".