80040040 has 32 divisors (see below), whose sum is σ = 180756360. Its totient is φ = 31897600.

The previous prime is 80040031. The next prime is 80040053. The reversal of 80040040 is 4004008.

It can be written as a sum of positive squares in 4 ways, for example, as 47527236 + 32512804 = 6894^2 + 5702^2 .

80040040 is a modest number, since divided by 40040 gives 80 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 80039996 and 80040023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7680 + ... + 14800.

Almost surely, 2^80040040 is an apocalyptic number.

It is an amenable number.

80040040 is an abundant number, since it is smaller than the sum of its proper divisors (100716320).

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

80040040 is a wasteful number, since it uses less digits than its factorization.

80040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7413 (or 7409 counting only the distinct ones).

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

The square root of 80040040 is about 8946.5099340469. The cubic root of 80040040 is about 430.9588123208.

Adding to 80040040 its reverse (4004008), we get a palindrome (84044048).

The spelling of 80040040 in words is "eighty million, forty thousand, forty".