284960861 has 4 divisors (see below), whose sum is σ = 286873500. Its totient is φ = 283048224.

The previous prime is 284960831. The next prime is 284960867. The reversal of 284960861 is 168069482.

It is a happy number.

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 23136100 + 261824761 = 4810^2 + 16181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284960861 is a prime.

It is a super-2 number, since 2×284960861² = 162405384603722642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284960867) 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, 956096 + ... + 956393.

It is an arithmetic number, because the mean of its divisors is an integer number (71718375).

Almost surely, 2^284960861 is an apocalyptic number.

It is an amenable number.

284960861 is a deficient number, since it is larger than the sum of its proper divisors (1912639).

284960861 is a wasteful number, since it uses less digits than its factorization.

284960861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912638.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 284960861 is about 16880.7837791970. The cubic root of 284960861 is about 658.0543102716.

The spelling of 284960861 in words is "two hundred eighty-four million, nine hundred sixty thousand, eight hundred sixty-one".