287881376 has 48 divisors (see below), whose sum is σ = 605283840. Its totient is φ = 134480640.

The previous prime is 287881367. The next prime is 287881427. The reversal of 287881376 is 673188782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23765 + ... + 33771.

It is an arithmetic number, because the mean of its divisors is an integer number (12610080).

Almost surely, 2^287881376 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 287881376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302641920).

287881376 is an abundant number, since it is smaller than the sum of its proper divisors (317402464).

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

287881376 is a wasteful number, since it uses less digits than its factorization.

287881376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077 (or 10069 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 287881376 is about 16967.0673953987. The cubic root of 287881376 is about 660.2947688512.

The spelling of 287881376 in words is "two hundred eighty-seven million, eight hundred eighty-one thousand, three hundred seventy-six".