285397387939 has 8 divisors (see below), whose sum is σ = 287386264800. Its totient is φ = 283409490816.

The previous prime is 285397387937. The next prime is 285397387949. The reversal of 285397387939 is 939783793582.

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

It is a cyclic number.

It is not a de Polignac number, because 285397387939 - 2¹ = 285397387937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285397387937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344619 + ... + 830395.

It is an arithmetic number, because the mean of its divisors is an integer number (35923283100).

Almost surely, 2^285397387939 is an apocalyptic number.

285397387939 is a deficient number, since it is larger than the sum of its proper divisors (1988876861).

285397387939 is a wasteful number, since it uses less digits than its factorization.

285397387939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489869.

The product of its digits is 617258880, while the sum is 73.

The spelling of 285397387939 in words is "two hundred eighty-five billion, three hundred ninety-seven million, three hundred eighty-seven thousand, nine hundred thirty-nine".