287438978 has 8 divisors (see below), whose sum is σ = 437593872. Its totient is φ = 141574356.

The previous prime is 287438971. The next prime is 287438989. The reversal of 287438978 is 879834782.

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

It is not an unprimeable number, because it can be changed into a prime (287438971) by changing a digit.

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, 1072400 + ... + 1072667.

It is an arithmetic number, because the mean of its divisors is an integer number (54699234).

Almost surely, 2^287438978 is an apocalyptic number.

287438978 is a deficient number, since it is larger than the sum of its proper divisors (150154894).

287438978 is a wasteful number, since it uses less digits than its factorization.

287438978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145136.

The product of its digits is 5419008, while the sum is 56.

The square root of 287438978 is about 16954.0254217103. The cubic root of 287438978 is about 659.9563622817.

The spelling of 287438978 in words is "two hundred eighty-seven million, four hundred thirty-eight thousand, nine hundred seventy-eight".