131763438 has 72 divisors (see below), whose sum is σ = 302986008. Its totient is φ = 41350176.

The previous prime is 131763431. The next prime is 131763469. The reversal of 131763438 is 834367131.

131763438 is a `hidden beast` number, since 1 + 3 + 17 + 634 + 3 + 8 = 666.

Its product of digits (36288) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131763431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1231381 + ... + 1231487.

It is an arithmetic number, because the mean of its divisors is an integer number (4208139).

Almost surely, 2^131763438 is an apocalyptic number.

131763438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131763438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151493004).

131763438 is an abundant number, since it is smaller than the sum of its proper divisors (171222570).

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

131763438 is a wasteful number, since it uses less digits than its factorization.

131763438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 192 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 131763438 is about 11478.8256367975. The cubic root of 131763438 is about 508.8599911093.

The spelling of 131763438 in words is "one hundred thirty-one million, seven hundred sixty-three thousand, four hundred thirty-eight".