285497661 has 16 divisors (see below), whose sum is σ = 393163200. Its totient is φ = 184140288.

The previous prime is 285497647. The next prime is 285497699. The reversal of 285497661 is 166794582.

It is not a de Polignac number, because 285497661 - 2⁷ = 285497533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285497661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285497621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12685 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (24572700).

Almost surely, 2^285497661 is an apocalyptic number.

It is an amenable number.

285497661 is a deficient number, since it is larger than the sum of its proper divisors (107665539).

285497661 is a wasteful number, since it uses less digits than its factorization.

285497661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14588.

The product of its digits is 725760, while the sum is 48.

The square root of 285497661 is about 16896.6760340607. The cubic root of 285497661 is about 658.4672581817.

The spelling of 285497661 in words is "two hundred eighty-five million, four hundred ninety-seven thousand, six hundred sixty-one".