287872704 has 140 divisors (see below), whose sum is σ = 975374224. Its totient is φ = 82238976.

The previous prime is 287872703. The next prime is 287872709. The reversal of 287872704 is 407278782.

It is a self number, because there is not a number n which added to its sum of digits gives 287872704.

It is not an unprimeable number, because it can be changed into a prime (287872703) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32322 + ... + 40254.

Almost surely, 2^287872704 is an apocalyptic number.

287872704 is a gapful number since it is divisible by the number (24) 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 287872704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487687112).

287872704 is an abundant number, since it is smaller than the sum of its proper divisors (687501520).

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

287872704 is an equidigital number, since it uses as much as digits as its factorization.

287872704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7964 (or 7945 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 287872704 is about 16966.8118395885. The cubic root of 287872704 is about 660.2881386507.

The spelling of 287872704 in words is "two hundred eighty-seven million, eight hundred seventy-two thousand, seven hundred four".