287873145 has 48 divisors (see below), whose sum is σ = 573281280. Its totient is φ = 130902912.

The previous prime is 287873137. The next prime is 287873149. The reversal of 287873145 is 541378782.

It is not a de Polignac number, because 287873145 - 2³ = 287873137 is a prime.

It is a super-2 number, since 2×287873145² = 165741895224382050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 287873145.

It is not an unprimeable number, because it can be changed into a prime (287873149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59736 + ... + 64374.

It is an arithmetic number, because the mean of its divisors is an integer number (11943360).

Almost surely, 2^287873145 is an apocalyptic number.

It is an amenable number.

287873145 is a deficient number, since it is larger than the sum of its proper divisors (285408135).

287873145 is a wasteful number, since it uses less digits than its factorization.

287873145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4854 (or 4851 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 287873145 is about 16966.8248355430. The cubic root of 287873145 is about 660.2884758217.

The spelling of 287873145 in words is "two hundred eighty-seven million, eight hundred seventy-three thousand, one hundred forty-five".