286728131 has 2 divisors, whose sum is σ = 286728132. Its totient is φ = 286728130.

The previous prime is 286728119. The next prime is 286728149. The reversal of 286728131 is 131827682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 286728131 - 2⁶ = 286728067 is a prime.

It is a super-2 number, since 2×286728131² = 164426042213506322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (286728151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143364065 + 143364066.

It is an arithmetic number, because the mean of its divisors is an integer number (143364066).

Almost surely, 2^286728131 is an apocalyptic number.

286728131 is a deficient number, since it is larger than the sum of its proper divisors (1).

286728131 is an equidigital number, since it uses as much as digits as its factorization.

286728131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 286728131 is about 16933.0484851370. The cubic root of 286728131 is about 659.4118812011.

The spelling of 286728131 in words is "two hundred eighty-six million, seven hundred twenty-eight thousand, one hundred thirty-one".