131856844 has 36 divisors (see below), whose sum is σ = 269187744. Its totient is φ = 56349216.

The previous prime is 131856841. The next prime is 131856859. The reversal of 131856844 is 448658131.

It is a junction number, because it is equal to n+sod(n) for n = 131856797 and 131856806.

It is not an unprimeable number, because it can be changed into a prime (131856841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90022 + ... + 91474.

Almost surely, 2^131856844 is an apocalyptic number.

131856844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131856844 is an abundant number, since it is smaller than the sum of its proper divisors (137330900).

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

131856844 is a wasteful number, since it uses less digits than its factorization.

131856844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1925 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 131856844 is about 11482.8935377804. The cubic root of 131856844 is about 508.9802049059.

The spelling of 131856844 in words is "one hundred thirty-one million, eight hundred fifty-six thousand, eight hundred forty-four".