816236452 has 6 divisors (see below), whose sum is σ = 1428413798. Its totient is φ = 408118224.

The previous prime is 816236429. The next prime is 816236459. The reversal of 816236452 is 254632618.

It can be written as a sum of positive squares in only one way, i.e., 533794816 + 282441636 = 23104^2 + 16806^2 .

It is not an unprimeable number, because it can be changed into a prime (816236459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102029553 + ... + 102029560.

Almost surely, 2^816236452 is an apocalyptic number.

It is an amenable number.

816236452 is a deficient number, since it is larger than the sum of its proper divisors (612177346).

816236452 is a wasteful number, since it uses less digits than its factorization.

816236452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204059117 (or 204059115 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 816236452 is about 28569.8521522251. The cubic root of 816236452 is about 934.5559968785. Note that the first 3 decimals are identical.

The spelling of 816236452 in words is "eight hundred sixteen million, two hundred thirty-six thousand, four hundred fifty-two".