287982005 has 8 divisors (see below), whose sum is σ = 345737400. Its totient is φ = 230279616.

The previous prime is 287981959. The next prime is 287982049. The reversal of 287982005 is 500289782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16589329 + 271392676 = 4073^2 + 16474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 287982005 - 2¹⁰ = 287980981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 23999.

It is an arithmetic number, because the mean of its divisors is an integer number (43217175).

Almost surely, 2^287982005 is an apocalyptic number.

It is an amenable number.

287982005 is a deficient number, since it is larger than the sum of its proper divisors (57755395).

287982005 is a wasteful number, since it uses less digits than its factorization.

287982005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26503.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 287982005 is about 16970.0325574231. The cubic root of 287982005 is about 660.3716952839.

It can be divided in two parts, 28798 and 2005, that added together give a palindrome (30803).

The spelling of 287982005 in words is "two hundred eighty-seven million, nine hundred eighty-two thousand, five".