131728844 has 24 divisors (see below), whose sum is σ = 248688720. Its totient is φ = 60692544.

The previous prime is 131728841. The next prime is 131728853. The reversal of 131728844 is 448827131.

It is a junction number, because it is equal to n+sod(n) for n = 131728798 and 131728807.

It is not an unprimeable number, because it can be changed into a prime (131728841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33662 + ... + 37370.

It is an arithmetic number, because the mean of its divisors is an integer number (10362030).

Almost surely, 2^131728844 is an apocalyptic number.

It is an amenable number.

131728844 is a deficient number, since it is larger than the sum of its proper divisors (116959876).

131728844 is a wasteful number, since it uses less digits than its factorization.

131728844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 131728844 is about 11477.3186764157. The cubic root of 131728844 is about 508.8154541128.

The spelling of 131728844 in words is "one hundred thirty-one million, seven hundred twenty-eight thousand, eight hundred forty-four".