813284 has 6 divisors (see below), whose sum is σ = 1423254. Its totient is φ = 406640.

The previous prime is 813283. The next prime is 813287. The reversal of 813284 is 482318.

It can be written as a sum of positive squares in only one way, i.e., 760384 + 52900 = 872^2 + 230^2 .

It is a super-2 number, since 2×813284² = 1322861729312, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (813283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101657 + ... + 101664.

It is an arithmetic number, because the mean of its divisors is an integer number (237209).

2⁸¹³²⁸⁴ is an apocalyptic number.

It is an amenable number.

813284 is a deficient number, since it is larger than the sum of its proper divisors (609970).

813284 is a wasteful number, since it uses less digits than its factorization.

813284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203325 (or 203323 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 813284 is about 901.8225989628. The cubic root of 813284 is about 93.3427824900.

The spelling of 813284 in words is "eight hundred thirteen thousand, two hundred eighty-four".