131644928 has 40 divisors (see below), whose sum is σ = 264441408. Its totient is φ = 65470464.

The previous prime is 131644921. The next prime is 131644969. The reversal of 131644928 is 829446131.

It is a junction number, because it is equal to n+sod(n) for n = 131644891 and 131644900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131644921) 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, 113600 + ... + 114752.

Almost surely, 2^131644928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131644928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132220704).

131644928 is an abundant number, since it is smaller than the sum of its proper divisors (132796480).

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

131644928 is an equidigital number, since it uses as much as digits as its factorization.

131644928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1378 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 131644928 is about 11473.6623621231. The cubic root of 131644928 is about 508.7073865951.

The spelling of 131644928 in words is "one hundred thirty-one million, six hundred forty-four thousand, nine hundred twenty-eight".