287878338 has 48 divisors (see below), whose sum is σ = 702404352. Its totient is φ = 84420000.

The previous prime is 287878321. The next prime is 287878363. The reversal of 287878338 is 833878782.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 17313 + ... + 29588.

It is an arithmetic number, because the mean of its divisors is an integer number (14633424).

Almost surely, 2^287878338 is an apocalyptic number.

287878338 is an abundant number, since it is smaller than the sum of its proper divisors (414526014).

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

287878338 is a wasteful number, since it uses less digits than its factorization.

287878338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46951 (or 46948 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 287878338 is about 16966.9778687897. The cubic root of 287878338 is about 660.2924461555.

The spelling of 287878338 in words is "two hundred eighty-seven million, eight hundred seventy-eight thousand, three hundred thirty-eight".