131574728 has 8 divisors (see below), whose sum is σ = 246702630. Its totient is φ = 65787360.

The previous prime is 131574727. The next prime is 131574763. The reversal of 131574728 is 827475131.

It can be written as a sum of positive squares in only one way, i.e., 119727364 + 11847364 = 10942^2 + 3442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 131574691 and 131574700.

It is not an unprimeable number, because it can be changed into a prime (131574721) 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 as a sum of consecutive naturals, namely, 8223413 + ... + 8223428.

Almost surely, 2^131574728 is an apocalyptic number.

It is an amenable number.

131574728 is a deficient number, since it is larger than the sum of its proper divisors (115127902).

131574728 is a wasteful number, since it uses less digits than its factorization.

131574728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16446847 (or 16446843 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 131574728 is about 11470.6027740481. The cubic root of 131574728 is about 508.6169473389.

The spelling of 131574728 in words is "one hundred thirty-one million, five hundred seventy-four thousand, seven hundred twenty-eight".