285961973442 has 16 divisors (see below), whose sum is σ = 572071055520. Its totient is φ = 95296139712.

The previous prime is 285961973399. The next prime is 285961973447. The reversal of 285961973442 is 244379169582.

It is a happy number.

It is a super-2 number, since 2×285961973442² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (285961973447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6104248 + ... + 6150915.

It is an arithmetic number, because the mean of its divisors is an integer number (35754440970).

Almost surely, 2^285961973442 is an apocalyptic number.

285961973442 is an abundant number, since it is smaller than the sum of its proper divisors (286109082078).

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

285961973442 is a wasteful number, since it uses less digits than its factorization.

285961973442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259057.

The product of its digits is 26127360, while the sum is 60.

The spelling of 285961973442 in words is "two hundred eighty-five billion, nine hundred sixty-one million, nine hundred seventy-three thousand, four hundred forty-two".