287845142 has 16 divisors (see below), whose sum is σ = 467325600. Its totient is φ = 132181632.

The previous prime is 287845141. The next prime is 287845157. The reversal of 287845142 is 241548782.

It is a self number, because there is not a number n which added to its sum of digits gives 287845142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287845141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22643 + ... + 32990.

It is an arithmetic number, because the mean of its divisors is an integer number (29207850).

Almost surely, 2^287845142 is an apocalyptic number.

287845142 is a deficient number, since it is larger than the sum of its proper divisors (179480458).

287845142 is a wasteful number, since it uses less digits than its factorization.

287845142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55847.

The product of its digits is 143360, while the sum is 41.

The square root of 287845142 is about 16965.9995874101. Note that the first 3 decimals coincide. The cubic root of 287845142 is about 660.2670651667.

The spelling of 287845142 in words is "two hundred eighty-seven million, eight hundred forty-five thousand, one hundred forty-two".