285435623 has 4 divisors (see below), whose sum is σ = 311384328. Its totient is φ = 259486920.

The previous prime is 285435617. The next prime is 285435637. The reversal of 285435623 is 326534582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 285435623 - 2¹⁸ = 285173479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285435323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12974336 + ... + 12974357.

It is an arithmetic number, because the mean of its divisors is an integer number (77846082).

Almost surely, 2^285435623 is an apocalyptic number.

285435623 is a deficient number, since it is larger than the sum of its proper divisors (25948705).

285435623 is a wasteful number, since it uses less digits than its factorization.

285435623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25948704.

The product of its digits is 172800, while the sum is 38.

The square root of 285435623 is about 16894.8401294596. The cubic root of 285435623 is about 658.4195602416.

The spelling of 285435623 in words is "two hundred eighty-five million, four hundred thirty-five thousand, six hundred twenty-three".