816144285 has 64 divisors (see below), whose sum is σ = 1477877760. Its totient is φ = 381024000.

The previous prime is 816144283. The next prime is 816144289. The reversal of 816144285 is 582441618.

It is not a de Polignac number, because 816144285 - 2¹ = 816144283 is a prime.

It is a super-2 number, since 2×816144285² = 1332182987876322450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816144283) 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 63 ways as a sum of consecutive naturals, for example, 1938375 + ... + 1938795.

It is an arithmetic number, because the mean of its divisors is an integer number (23091840).

Almost surely, 2^816144285 is an apocalyptic number.

It is an amenable number.

816144285 is a deficient number, since it is larger than the sum of its proper divisors (661733475).

816144285 is a wasteful number, since it uses less digits than its factorization.

816144285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

The product of its digits is 61440, while the sum is 39.

The square root of 816144285 is about 28568.2390951910. The cubic root of 816144285 is about 934.5208197904.

The spelling of 816144285 in words is "eight hundred sixteen million, one hundred forty-four thousand, two hundred eighty-five".