287670 has 32 divisors (see below), whose sum is σ = 709632. Its totient is φ = 74592.

The previous prime is 287669. The next prime is 287671. The reversal of 287670 is 76782.

It is an interprime number because it is at equal distance from previous prime (287669) and next prime (287671).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

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 287670.

It is not an unprimeable number, because it can be changed into a prime (287671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (22176).

2²⁸⁷⁶⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354816).

287670 is an abundant number, since it is smaller than the sum of its proper divisors (421962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287670 is a wasteful number, since it uses less digits than its factorization.

287670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 287670 is about 536.3487671283. The cubic root of 287670 is about 66.0133122826.

The spelling of 287670 in words is "two hundred eighty-seven thousand, six hundred seventy".