287878812 has 48 divisors (see below), whose sum is σ = 725864832. Its totient is φ = 88274880.

The previous prime is 287878783. The next prime is 287878841. The reversal of 287878812 is 218878782.

It is an interprime number because it is at equal distance from previous prime (287878783) and next prime (287878841).

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 15 ways as a sum of consecutive naturals, for example, 44887 + ... + 50897.

It is an arithmetic number, because the mean of its divisors is an integer number (15122184).

Almost surely, 2^287878812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 287878812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362932416).

287878812 is an abundant number, since it is smaller than the sum of its proper divisors (437986020).

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

287878812 is a wasteful number, since it uses less digits than its factorization.

287878812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338 (or 6336 counting only the distinct ones).

The product of its digits is 802816, while the sum is 51.

The square root of 287878812 is about 16966.9918370936. The cubic root of 287878812 is about 660.2928085521.

It can be divided in two parts, 2878788 and 12, that added together give a triangular number (2878800 = T₂₃₉₉).

The spelling of 287878812 in words is "two hundred eighty-seven million, eight hundred seventy-eight thousand, eight hundred twelve".