287040089 has 6 divisors (see below), whose sum is σ = 333903834. Its totient is φ = 246034320.

The previous prime is 287040079. The next prime is 287040107. The reversal of 287040089 is 980040782.

It can be written as a sum of positive squares in only one way, i.e., 286726489 + 313600 = 16933^2 + 560^2 .

It is not a de Polignac number, because 287040089 - 2²⁰ = 285991513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287040029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2928932 + ... + 2929029.

It is an arithmetic number, because the mean of its divisors is an integer number (55650639).

Almost surely, 2^287040089 is an apocalyptic number.

It is an amenable number.

287040089 is a deficient number, since it is larger than the sum of its proper divisors (46863745).

287040089 is an equidigital number, since it uses as much as digits as its factorization.

287040089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857975 (or 5857968 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 287040089 is about 16942.2574942066. The cubic root of 287040089 is about 659.6509395416.

The spelling of 287040089 in words is "two hundred eighty-seven million, forty thousand, eighty-nine".