287876540 has 96 divisors (see below), whose sum is σ = 720728064. Its totient is φ = 94510080.

The previous prime is 287876531. The next prime is 287876569. The reversal of 287876540 is 45678782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490127 + ... + 490713.

It is an arithmetic number, because the mean of its divisors is an integer number (7507584).

Almost surely, 2^287876540 is an apocalyptic number.

287876540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287876540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360364032).

287876540 is an abundant number, since it is smaller than the sum of its proper divisors (432851524).

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

287876540 is a wasteful number, since it uses less digits than its factorization.

287876540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 287876540 is about 16966.9248834313. The cubic root of 287876540 is about 660.2910714911.

The spelling of 287876540 in words is "two hundred eighty-seven million, eight hundred seventy-six thousand, five hundred forty".