287838257 has 8 divisors (see below), whose sum is σ = 329280000. Its totient is φ = 246477024.

The previous prime is 287838241. The next prime is 287838263. The reversal of 287838257 is 752838782.

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 287838257 - 2⁴ = 287838241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (287838227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12257 + ... + 26942.

It is an arithmetic number, because the mean of its divisors is an integer number (41160000).

Almost surely, 2^287838257 is an apocalyptic number.

It is an amenable number.

287838257 is a deficient number, since it is larger than the sum of its proper divisors (41441743).

287838257 is a wasteful number, since it uses less digits than its factorization.

287838257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40255.

The product of its digits is 1505280, while the sum is 50.

The square root of 287838257 is about 16965.7966803802. The cubic root of 287838257 is about 660.2618007909.

The spelling of 287838257 in words is "two hundred eighty-seven million, eight hundred thirty-eight thousand, two hundred fifty-seven".