80131780 has 12 divisors (see below), whose sum is σ = 168276780. Its totient is φ = 32052704.

The previous prime is 80131771. The next prime is 80131787. The reversal of 80131780 is 8713108.

It is a happy number.

80131780 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 46212804 + 33918976 = 6798^2 + 5824^2 .

It is a super-2 number, since 2×80131780² = 12842204331936800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80131787) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2003275 + ... + 2003314.

It is an arithmetic number, because the mean of its divisors is an integer number (14023065).

Almost surely, 2^80131780 is an apocalyptic number.

It is an amenable number.

80131780 is an abundant number, since it is smaller than the sum of its proper divisors (88145000).

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

80131780 is a wasteful number, since it uses less digits than its factorization.

80131780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006598 (or 4006596 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 80131780 is about 8951.6356047373. The cubic root of 80131780 is about 431.1234010522.

Adding to 80131780 its reverse (8713108), we get a palindrome (88844888).

The spelling of 80131780 in words is "eighty million, one hundred thirty-one thousand, seven hundred eighty".