287660871 has 12 divisors (see below), whose sum is σ = 417130272. Its totient is φ = 191026176.

The previous prime is 287660861. The next prime is 287660881. The reversal of 287660871 is 178066782.

It is an interprime number because it is at equal distance from previous prime (287660861) and next prime (287660881).

It is not a de Polignac number, because 287660871 - 2¹¹ = 287658823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287660801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59871 + ... + 64496.

It is an arithmetic number, because the mean of its divisors is an integer number (34760856).

Almost surely, 2^287660871 is an apocalyptic number.

287660871 is a deficient number, since it is larger than the sum of its proper divisors (129469401).

287660871 is a wasteful number, since it uses less digits than its factorization.

287660871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124630 (or 124627 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 287660871 is about 16960.5681213808. The cubic root of 287660871 is about 660.1261398024.

The spelling of 287660871 in words is "two hundred eighty-seven million, six hundred sixty thousand, eight hundred seventy-one".