285272644 has 6 divisors (see below), whose sum is σ = 499227134. Its totient is φ = 142636320.

The previous prime is 285272641. The next prime is 285272671. The reversal of 285272644 is 446272582.

It can be written as a sum of positive squares in only one way, i.e., 147914244 + 137358400 = 12162^2 + 11720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285272597 and 285272606.

It is not an unprimeable number, because it can be changed into a prime (285272641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35659077 + ... + 35659084.

Almost surely, 2^285272644 is an apocalyptic number.

It is an amenable number.

285272644 is a deficient number, since it is larger than the sum of its proper divisors (213954490).

285272644 is a wasteful number, since it uses less digits than its factorization.

285272644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71318165 (or 71318163 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 285272644 is about 16890.0161041960. The cubic root of 285272644 is about 658.2942208386.

The spelling of 285272644 in words is "two hundred eighty-five million, two hundred seventy-two thousand, six hundred forty-four".