287861478 has 8 divisors (see below), whose sum is σ = 575722968. Its totient is φ = 95953824.

The previous prime is 287861449. The next prime is 287861489. The reversal of 287861478 is 874168782.

It is a sphenic number, since it is the product of 3 distinct primes.

287861478 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 287861478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23988451 + ... + 23988462.

It is an arithmetic number, because the mean of its divisors is an integer number (71965371).

Almost surely, 2^287861478 is an apocalyptic number.

287861478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

287861478 is a wasteful number, since it uses less digits than its factorization.

287861478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47976918.

The product of its digits is 1204224, while the sum is 51.

The square root of 287861478 is about 16966.4810140465. The cubic root of 287861478 is about 660.2795555850.

The spelling of 287861478 in words is "two hundred eighty-seven million, eight hundred sixty-one thousand, four hundred seventy-eight".