283138885 has 8 divisors (see below), whose sum is σ = 340437240. Its totient is φ = 226064064.

The previous prime is 283138871. The next prime is 283138939. The reversal of 283138885 is 588831382.

It can be written as a sum of positive squares in 4 ways, for example, as 95531076 + 187607809 = 9774^2 + 13697^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 283138885 - 2¹¹ = 283136837 is a prime.

It is a super-4 number, since 4×283138885⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53082 + ... + 58171.

It is an arithmetic number, because the mean of its divisors is an integer number (42554655).

Almost surely, 2^283138885 is an apocalyptic number.

It is an amenable number.

283138885 is a deficient number, since it is larger than the sum of its proper divisors (57298355).

283138885 is a wasteful number, since it uses less digits than its factorization.

283138885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111767.

The product of its digits is 368640, while the sum is 46.

The square root of 283138885 is about 16826.7312630826. The cubic root of 283138885 is about 656.6488265343.

The spelling of 283138885 in words is "two hundred eighty-three million, one hundred thirty-eight thousand, eight hundred eighty-five".