131474640 has 80 divisors (see below), whose sum is σ = 444632256. Its totient is φ = 31872000.

The previous prime is 131474639. The next prime is 131474669. The reversal of 131474640 is 46474131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 131474598 and 131474607.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22261 + ... + 27540.

Almost surely, 2^131474640 is an apocalyptic number.

131474640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131474640 is an abundant number, since it is smaller than the sum of its proper divisors (313157616).

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

131474640 is a wasteful number, since it uses less digits than its factorization.

131474640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49828 (or 49822 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 131474640 is about 11466.2391393168. The cubic root of 131474640 is about 508.4879474736.

The spelling of 131474640 in words is "one hundred thirty-one million, four hundred seventy-four thousand, six hundred forty".