390287 has 8 divisors (see below), whose sum is σ = 414720. Its totient is φ = 366520.

The previous prime is 390281. The next prime is 390289. The reversal of 390287 is 782093.

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 390287 - 2⁶ = 390223 is a prime.

It is a pancake number, because a pancake can be divided into 390287 parts by 883 straight cuts.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390287.

It is not an unprimeable number, because it can be changed into a prime (390281) 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, 1514 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2³⁹⁰²⁸⁷ is an apocalyptic number.

390287 is a deficient number, since it is larger than the sum of its proper divisors (24433).

390287 is a wasteful number, since it uses less digits than its factorization.

390287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 390287 is about 624.7295414818. The cubic root of 390287 is about 73.0793532539.

The spelling of 390287 in words is "three hundred ninety thousand, two hundred eighty-seven".