287838045 has 24 divisors (see below), whose sum is σ = 544276512. Its totient is φ = 139557600.

The previous prime is 287838041. The next prime is 287838073. The reversal of 287838045 is 540838782.

It is not a de Polignac number, because 287838045 - 2² = 287838041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287838041) 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 in 23 ways as a sum of consecutive naturals, for example, 290251 + ... + 291240.

It is an arithmetic number, because the mean of its divisors is an integer number (22678188).

Almost surely, 2^287838045 is an apocalyptic number.

It is an amenable number.

287838045 is a deficient number, since it is larger than the sum of its proper divisors (256438467).

287838045 is a wasteful number, since it uses less digits than its factorization.

287838045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581513 (or 581510 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 287838045 is about 16965.7904325145. The cubic root of 287838045 is about 660.2616386911.

The spelling of 287838045 in words is "two hundred eighty-seven million, eight hundred thirty-eight thousand, forty-five".