285507641 has 8 divisors (see below), whose sum is σ = 293424768. Its totient is φ = 277636000.

The previous prime is 285507637. The next prime is 285507653. The reversal of 285507641 is 146705582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285507641 - 2² = 285507637 is a prime.

It is a super-2 number, since 2×285507641² = 163029226138769762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285507595 and 285507604.

It is not an unprimeable number, because it can be changed into a prime (285507611) 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, 1556 + ... + 23946.

It is an arithmetic number, because the mean of its divisors is an integer number (36678096).

Almost surely, 2^285507641 is an apocalyptic number.

It is an amenable number.

285507641 is a deficient number, since it is larger than the sum of its proper divisors (7917127).

285507641 is a wasteful number, since it uses less digits than its factorization.

285507641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22743.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 285507641 is about 16896.9713558377. The cubic root of 285507641 is about 658.4749306633.

The spelling of 285507641 in words is "two hundred eighty-five million, five hundred seven thousand, six hundred forty-one".