817072852 has 6 divisors (see below), whose sum is σ = 1429877498. Its totient is φ = 408536424.

The previous prime is 817072849. The next prime is 817072891. The reversal of 817072852 is 258270718.

It can be written as a sum of positive squares in only one way, i.e., 622302916 + 194769936 = 24946^2 + 13956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102134103 + ... + 102134110.

Almost surely, 2^817072852 is an apocalyptic number.

It is an amenable number.

817072852 is a deficient number, since it is larger than the sum of its proper divisors (612804646).

817072852 is a wasteful number, since it uses less digits than its factorization.

817072852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204268217 (or 204268215 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 817072852 is about 28584.4862119297. The cubic root of 817072852 is about 934.8751020410.

The spelling of 817072852 in words is "eight hundred seventeen million, seventy-two thousand, eight hundred fifty-two".