80188040 has 16 divisors (see below), whose sum is σ = 180423180. Its totient is φ = 32075200.

The previous prime is 80188033. The next prime is 80188049. The reversal of 80188040 is 4088108.

It can be written as a sum of positive squares in 2 ways, for example, as 80174116 + 13924 = 8954^2 + 118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80187994 and 80188012.

It is not an unprimeable number, because it can be changed into a prime (80188049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002311 + ... + 1002390.

Almost surely, 2^80188040 is an apocalyptic number.

It is an amenable number.

80188040 is an abundant number, since it is smaller than the sum of its proper divisors (100235140).

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

80188040 is a wasteful number, since it uses less digits than its factorization.

80188040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004712 (or 2004708 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 80188040 is about 8954.7774958399. Note that the first 3 decimals coincide. The cubic root of 80188040 is about 431.2242737576.

The spelling of 80188040 in words is "eighty million, one hundred eighty-eight thousand, forty".