131478284 has 12 divisors (see below), whose sum is σ = 262956624. Its totient is φ = 56347824.

The previous prime is 131478251. The next prime is 131478287. The reversal of 131478284 is 482874131.

131478284 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (131478287) 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, 2347799 + ... + 2347854.

It is an arithmetic number, because the mean of its divisors is an integer number (21913052).

Almost surely, 2^131478284 is an apocalyptic number.

131478284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131478284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131478284 is a wasteful number, since it uses less digits than its factorization.

131478284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695664 (or 4695662 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 131478284 is about 11466.3980394891. The cubic root of 131478284 is about 508.4926452439.

The spelling of 131478284 in words is "one hundred thirty-one million, four hundred seventy-eight thousand, two hundred eighty-four".