285161344 has 64 divisors (see below), whose sum is σ = 614754000. Its totient is φ = 130977792.

The previous prime is 285161341. The next prime is 285161353. The reversal of 285161344 is 443161582.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×285161344² = 162633984223772672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285161341) 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, 680367 + ... + 680785.

Almost surely, 2^285161344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285161344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307377000).

285161344 is an abundant number, since it is smaller than the sum of its proper divisors (329592656).

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

285161344 is a wasteful number, since it uses less digits than its factorization.

285161344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 843 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 285161344 is about 16886.7209368782. The cubic root of 285161344 is about 658.2085978635.

The spelling of 285161344 in words is "two hundred eighty-five million, one hundred sixty-one thousand, three hundred forty-four".