285652081 has 36 divisors (see below), whose sum is σ = 347074140. Its totient is φ = 234748800.

The previous prime is 285652079. The next prime is 285652091. The reversal of 285652081 is 180256582.

It can be written as a sum of positive squares in 6 ways, for example, as 50183056 + 235469025 = 7084^2 + 15345^2 .

It is not a de Polignac number, because 285652081 - 2¹ = 285652079 is a prime.

It is a super-2 number, since 2×285652081² = 163194222759261122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285652081.

It is not an unprimeable number, because it can be changed into a prime (285652091) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1247275 + ... + 1247503.

Almost surely, 2^285652081 is an apocalyptic number.

It is an amenable number.

285652081 is a deficient number, since it is larger than the sum of its proper divisors (61422059).

285652081 is a wasteful number, since it uses less digits than its factorization.

285652081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 285652081 is about 16901.2449541447. The cubic root of 285652081 is about 658.5859540604.

The spelling of 285652081 in words is "two hundred eighty-five million, six hundred fifty-two thousand, eighty-one".