287631568 has 80 divisors (see below), whose sum is σ = 688348800. Its totient is φ = 115981824.

The previous prime is 287631563. The next prime is 287631569. The reversal of 287631568 is 865136782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287631563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91755 + ... + 94837.

It is an arithmetic number, because the mean of its divisors is an integer number (8604360).

Almost surely, 2^287631568 is an apocalyptic number.

287631568 is a gapful number since it is divisible by the number (28) 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 287631568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344174400).

287631568 is an abundant number, since it is smaller than the sum of its proper divisors (400717232).

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

287631568 is a wasteful number, since it uses less digits than its factorization.

287631568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129 (or 3109 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 287631568 is about 16959.7042427042. The cubic root of 287631568 is about 660.1037241327.

The spelling of 287631568 in words is "two hundred eighty-seven million, six hundred thirty-one thousand, five hundred sixty-eight".