287404216 has 16 divisors (see below), whose sum is σ = 587872440. Its totient is φ = 130638240.

The previous prime is 287404199. The next prime is 287404223. The reversal of 287404216 is 612404782.

It is a happy number.

287404216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1632891 + ... + 1633066.

Almost surely, 2^287404216 is an apocalyptic number.

It is an amenable number.

287404216 is an abundant number, since it is smaller than the sum of its proper divisors (300468224).

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

287404216 is a wasteful number, since it uses less digits than its factorization.

287404216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265974 (or 3265970 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 287404216 is about 16953.0002064531. Note that the first 3 decimals coincide. The cubic root of 287404216 is about 659.9297568341.

Adding to 287404216 its reverse (612404782), we get a palindrome (899808998).

The spelling of 287404216 in words is "two hundred eighty-seven million, four hundred four thousand, two hundred sixteen".