285772813 has 8 divisors (see below), whose sum is σ = 292476960. Its totient is φ = 279130800.

The previous prime is 285772811. The next prime is 285772841. The reversal of 285772813 is 318277582.

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 285772813 - 2¹ = 285772811 is a prime.

It is a super-2 number, since 2×285772813² = 163332201299865938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285772813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285772811) 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, 6163 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (36559620).

Almost surely, 2^285772813 is an apocalyptic number.

It is an amenable number.

285772813 is a deficient number, since it is larger than the sum of its proper divisors (6704147).

285772813 is a wasteful number, since it uses less digits than its factorization.

285772813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31067.

The product of its digits is 188160, while the sum is 43.

The square root of 285772813 is about 16904.8162663781. The cubic root of 285772813 is about 658.6787256582.

The spelling of 285772813 in words is "two hundred eighty-five million, seven hundred seventy-two thousand, eight hundred thirteen".