80144740 has 24 divisors (see below), whose sum is σ = 181251000. Its totient is φ = 29591808.

The previous prime is 80144737. The next prime is 80144741. The reversal of 80144740 is 4744108.

It can be written as a sum of positive squares in 4 ways, for example, as 1183744 + 78960996 = 1088^2 + 8886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80144699 and 80144708.

It is not an unprimeable number, because it can be changed into a prime (80144741) 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 7 ways as a sum of consecutive naturals, for example, 153865 + ... + 154384.

It is an arithmetic number, because the mean of its divisors is an integer number (7552125).

Almost surely, 2^80144740 is an apocalyptic number.

It is an amenable number.

80144740 is an abundant number, since it is smaller than the sum of its proper divisors (101106260).

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

80144740 is a wasteful number, since it uses less digits than its factorization.

80144740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308271 (or 308269 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 80144740 is about 8952.3594655264. The cubic root of 80144740 is about 431.1466421769.

Adding to 80144740 its reverse (4744108), we get a palindrome (84888848).

The spelling of 80144740 in words is "eighty million, one hundred forty-four thousand, seven hundred forty".