285639413 has 4 divisors (see below), whose sum is σ = 288467628. Its totient is φ = 282811200.

The previous prime is 285639401. The next prime is 285639449. The reversal of 285639413 is 314936582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144552529 + 141086884 = 12023^2 + 11878^2 .

It is a cyclic number.

It is not a de Polignac number, because 285639413 - 2⁴ = 285639397 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 (285639713) 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, 1413956 + ... + 1414157.

It is an arithmetic number, because the mean of its divisors is an integer number (72116907).

Almost surely, 2^285639413 is an apocalyptic number.

It is an amenable number.

285639413 is a deficient number, since it is larger than the sum of its proper divisors (2828215).

285639413 is a wasteful number, since it uses less digits than its factorization.

285639413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828214.

The product of its digits is 155520, while the sum is 41.

The square root of 285639413 is about 16900.8701846976. The cubic root of 285639413 is about 658.5762183355.

The spelling of 285639413 in words is "two hundred eighty-five million, six hundred thirty-nine thousand, four hundred thirteen".