287390 has 16 divisors (see below), whose sum is σ = 535680. Its totient is φ = 110880.

The previous prime is 287387. The next prime is 287393. The reversal of 287390 is 93782.

287390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (287387) and next prime (287393).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287393) 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, 206 + ... + 785.

It is an arithmetic number, because the mean of its divisors is an integer number (33480).

2²⁸⁷³⁹⁰ is an apocalyptic number.

287390 is a deficient number, since it is larger than the sum of its proper divisors (248290).

287390 is a wasteful number, since it uses less digits than its factorization.

287390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

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

The square root of 287390 is about 536.0876793958. The cubic root of 287390 is about 65.9918875857.

The spelling of 287390 in words is "two hundred eighty-seven thousand, three hundred ninety".