286731442 has 4 divisors (see below), whose sum is σ = 430097166. Its totient is φ = 143365720.

The previous prime is 286731433. The next prime is 286731449. The reversal of 286731442 is 244137682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 269583561 + 17147881 = 16419^2 + 4141^2 .

It is not an unprimeable number, because it can be changed into a prime (286731449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71682859 + ... + 71682862.

Almost surely, 2^286731442 is an apocalyptic number.

286731442 is a deficient number, since it is larger than the sum of its proper divisors (143365724).

286731442 is a wasteful number, since it uses less digits than its factorization.

286731442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143365723.

The product of its digits is 64512, while the sum is 37.

The square root of 286731442 is about 16933.1462522474. The cubic root of 286731442 is about 659.4144193829.

The spelling of 286731442 in words is "two hundred eighty-six million, seven hundred thirty-one thousand, four hundred forty-two".