817406452 has 6 divisors (see below), whose sum is σ = 1430461298. Its totient is φ = 408703224.

The previous prime is 817406431. The next prime is 817406459. The reversal of 817406452 is 254604718.

It can be written as a sum of positive squares in only one way, i.e., 699814116 + 117592336 = 26454^2 + 10844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817406459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102175803 + ... + 102175810.

Almost surely, 2^817406452 is an apocalyptic number.

It is an amenable number.

817406452 is a deficient number, since it is larger than the sum of its proper divisors (613054846).

817406452 is a wasteful number, since it uses less digits than its factorization.

817406452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204351617 (or 204351615 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 817406452 is about 28590.3209495801. The cubic root of 817406452 is about 935.0023170942.

The spelling of 817406452 in words is "eight hundred seventeen million, four hundred six thousand, four hundred fifty-two".