287697385 has 16 divisors (see below), whose sum is σ = 355340736. Its totient is φ = 223449408.

The previous prime is 287697367. The next prime is 287697401. The reversal of 287697385 is 583796782.

It is a cyclic number.

It is not a de Polignac number, because 287697385 - 2⁷ = 287697257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99774 + ... + 102616.

It is an arithmetic number, because the mean of its divisors is an integer number (22208796).

Almost surely, 2^287697385 is an apocalyptic number.

It is an amenable number.

287697385 is a deficient number, since it is larger than the sum of its proper divisors (67643351).

287697385 is a wasteful number, since it uses less digits than its factorization.

287697385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its digits is 5080320, while the sum is 55.

The square root of 287697385 is about 16961.6445252222. The cubic root of 287697385 is about 660.1540694799.

The spelling of 287697385 in words is "two hundred eighty-seven million, six hundred ninety-seven thousand, three hundred eighty-five".