80181940 has 12 divisors (see below), whose sum is σ = 168382116. Its totient is φ = 32072768.

The previous prime is 80181929. The next prime is 80181943. The reversal of 80181940 is 4918108.

It can be written as a sum of positive squares in 2 ways, for example, as 41319184 + 38862756 = 6428^2 + 6234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80181943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004529 + ... + 2004568.

It is an arithmetic number, because the mean of its divisors is an integer number (14031843).

Almost surely, 2^80181940 is an apocalyptic number.

It is an amenable number.

80181940 is an abundant number, since it is smaller than the sum of its proper divisors (88200176).

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

80181940 is a wasteful number, since it uses less digits than its factorization.

80181940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009106 (or 4009104 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 80181940 is about 8954.4368890511. The cubic root of 80181940 is about 431.2133388985.

The spelling of 80181940 in words is "eighty million, one hundred eighty-one thousand, nine hundred forty".