287996256 has 96 divisors (see below), whose sum is σ = 843907680. Its totient is φ = 95551488.

The previous prime is 287996239. The next prime is 287996273. The reversal of 287996256 is 652699782.

287996256 is a `hidden beast` number, since 2 + 8 + 7 + 9 + 9 + 625 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (287996239) and next prime (287996273).

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 221400 + ... + 222696.

It is an arithmetic number, because the mean of its divisors is an integer number (8790705).

Almost surely, 2^287996256 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 287996256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421953840).

287996256 is an abundant number, since it is smaller than the sum of its proper divisors (555911424).

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

287996256 is a wasteful number, since it uses less digits than its factorization.

287996256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1559 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 287996256 is about 16970.4524394608. The cubic root of 287996256 is about 660.3825880962.

The spelling of 287996256 in words is "two hundred eighty-seven million, nine hundred ninety-six thousand, two hundred fifty-six".