285661023 has 8 divisors (see below), whose sum is σ = 384808368. Its totient is φ = 188477184.

The previous prime is 285661021. The next prime is 285661039. The reversal of 285661023 is 320166582.

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

It is not a de Polignac number, because 285661023 - 2¹ = 285661021 is a prime.

It is a super-2 number, since 2×285661023² = 163204440122813058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285661021) 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, 490536 + ... + 491117.

It is an arithmetic number, because the mean of its divisors is an integer number (48101046).

Almost surely, 2^285661023 is an apocalyptic number.

285661023 is a deficient number, since it is larger than the sum of its proper divisors (99147345).

285661023 is an equidigital number, since it uses as much as digits as its factorization.

285661023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981753.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 285661023 is about 16901.5094888001. The cubic root of 285661023 is about 658.5928260730.

The spelling of 285661023 in words is "two hundred eighty-five million, six hundred sixty-one thousand, twenty-three".