80400040 has 64 divisors (see below), whose sum is σ = 208863360. Its totient is φ = 27283200.

The previous prime is 80400029. The next prime is 80400059. The reversal of 80400040 is 4000408.

It is a junction number, because it is equal to n+sod(n) for n = 80399987 and 80400023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26859 + ... + 29701.

It is an arithmetic number, because the mean of its divisors is an integer number (3263490).

Almost surely, 2^80400040 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 80400040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104431680).

80400040 is an abundant number, since it is smaller than the sum of its proper divisors (128463320).

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

80400040 is a wasteful number, since it uses less digits than its factorization.

80400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2958 counting only the distinct ones).

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

The square root of 80400040 is about 8966.6069390824. The cubic root of 80400040 is about 431.6039608847.

Adding to 80400040 its reverse (4000408), we get a palindrome (84400448).

The spelling of 80400040 in words is "eighty million, four hundred thousand, forty".