131878540 has 12 divisors (see below), whose sum is σ = 276944976. Its totient is φ = 52751408.

The previous prime is 131878531. The next prime is 131878541. The reversal of 131878540 is 45878131.

It is a super-3 number, since 3×131878540³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131878540.

It is not an unprimeable number, because it can be changed into a prime (131878541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296944 + ... + 3296983.

It is an arithmetic number, because the mean of its divisors is an integer number (23078748).

Almost surely, 2^131878540 is an apocalyptic number.

131878540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131878540 is an abundant number, since it is smaller than the sum of its proper divisors (145066436).

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

131878540 is a wasteful number, since it uses less digits than its factorization.

131878540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593936 (or 6593934 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 131878540 is about 11483.8382085433. The cubic root of 131878540 is about 509.0081195962.

The spelling of 131878540 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, five hundred forty".