131228744 has 32 divisors (see below), whose sum is σ = 263412000. Its totient is φ = 61103232.

The previous prime is 131228743. The next prime is 131228771. The reversal of 131228744 is 447822131.

It is a self number, because there is not a number n which added to its sum of digits gives 131228744.

It is not an unprimeable number, because it can be changed into a prime (131228743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 16284.

It is an arithmetic number, because the mean of its divisors is an integer number (8231625).

Almost surely, 2^131228744 is an apocalyptic number.

It is an amenable number.

131228744 is an abundant number, since it is smaller than the sum of its proper divisors (132183256).

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

131228744 is a wasteful number, since it uses less digits than its factorization.

131228744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14717 (or 14713 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 131228744 is about 11455.5115119317. The cubic root of 131228744 is about 508.1707426140.

The spelling of 131228744 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, seven hundred forty-four".