285017942978 has 8 divisors (see below), whose sum is σ = 427531115280. Its totient is φ = 142507571220.

The previous prime is 285017942947. The next prime is 285017943071. The reversal of 285017942978 is 879249710582.

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

It is a self number, because there is not a number n which added to its sum of digits gives 285017942978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423908 + ... + 865871.

It is an arithmetic number, because the mean of its divisors is an integer number (53441389410).

Almost surely, 2^285017942978 is an apocalyptic number.

285017942978 is a deficient number, since it is larger than the sum of its proper divisors (142513172302).

285017942978 is a wasteful number, since it uses less digits than its factorization.

285017942978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400272.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 285017942978 in words is "two hundred eighty-five billion, seventeen million, nine hundred forty-two thousand, nine hundred seventy-eight".