285641609 has 8 divisors (see below), whose sum is σ = 312608352. Its totient is φ = 258841440.

The previous prime is 285641563. The next prime is 285641617. The reversal of 285641609 is 906146582.

It is a happy number.

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

It is not a de Polignac number, because 285641609 - 2⁸ = 285641353 is a prime.

It is a super-2 number, since 2×285641609² = 163182257584217762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285641659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38039 + ... + 44924.

It is an arithmetic number, because the mean of its divisors is an integer number (39076044).

Almost surely, 2^285641609 is an apocalyptic number.

It is an amenable number.

285641609 is a deficient number, since it is larger than the sum of its proper divisors (26966743).

285641609 is a wasteful number, since it uses less digits than its factorization.

285641609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83287.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 285641609 is about 16900.9351516418. The cubic root of 285641609 is about 658.5779060457.

The spelling of 285641609 in words is "two hundred eighty-five million, six hundred forty-one thousand, six hundred nine".