287389045 has 4 divisors (see below), whose sum is σ = 344866860. Its totient is φ = 229911232.

The previous prime is 287389031. The next prime is 287389051. The reversal of 287389045 is 540983782.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115412049 + 171976996 = 10743^2 + 13114^2 .

It is a cyclic number.

It is not a de Polignac number, because 287389045 - 2⁵ = 287389013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287388986 and 287389004.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 28738900 + ... + 28738909.

It is an arithmetic number, because the mean of its divisors is an integer number (86216715).

Almost surely, 2^287389045 is an apocalyptic number.

It is an amenable number.

287389045 is a deficient number, since it is larger than the sum of its proper divisors (57477815).

287389045 is an equidigital number, since it uses as much as digits as its factorization.

287389045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57477814.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 287389045 is about 16952.5527576233. The cubic root of 287389045 is about 659.9181448837.

The spelling of 287389045 in words is "two hundred eighty-seven million, three hundred eighty-nine thousand, forty-five".