287128012 has 12 divisors (see below), whose sum is σ = 502767720. Its totient is φ = 143480096.

The previous prime is 287128003. The next prime is 287128013. The reversal of 287128012 is 210821782.

287128012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (287128013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12937 + ... + 27232.

It is an arithmetic number, because the mean of its divisors is an integer number (41897310).

Almost surely, 2^287128012 is an apocalyptic number.

It is an amenable number.

287128012 is a deficient number, since it is larger than the sum of its proper divisors (215639708).

287128012 is a wasteful number, since it uses less digits than its factorization.

287128012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41960 (or 41958 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 287128012 is about 16944.8520796140. The cubic root of 287128012 is about 659.7182850344.

Adding to 287128012 its reverse (210821782), we get a palindrome (497949794).

The spelling of 287128012 in words is "two hundred eighty-seven million, one hundred twenty-eight thousand, twelve".