287888256 has 80 divisors (see below), whose sum is σ = 856781640. Its totient is φ = 95959296.

The previous prime is 287888233. The next prime is 287888273. The reversal of 287888256 is 652888782.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3516 + ... + 24251.

Almost surely, 2^287888256 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 287888256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428390820).

287888256 is an abundant number, since it is smaller than the sum of its proper divisors (568893384).

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

287888256 is an equidigital number, since it uses as much as digits as its factorization.

287888256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27793 (or 27772 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The square root of 287888256 is about 16967.2701398899. The cubic root of 287888256 is about 660.3000288787.

The spelling of 287888256 in words is "two hundred eighty-seven million, eight hundred eighty-eight thousand, two hundred fifty-six".