816505732 has 12 divisors (see below), whose sum is σ = 1633011520. Its totient is φ = 349931016.

The previous prime is 816505633. The next prime is 816505741. The reversal of 816505732 is 237505618.

816505732 is an admirable number.

It is a super-2 number, since 2×816505732² = 1333363220777711648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816505691 and 816505700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14580432 + ... + 14580487.

Almost surely, 2^816505732 is an apocalyptic number.

It is an amenable number.

816505732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816505732 is a wasteful number, since it uses less digits than its factorization.

816505732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29160930 (or 29160928 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 816505732 is about 28574.5644236268. The cubic root of 816505732 is about 934.6587569586.

The spelling of 816505732 in words is "eight hundred sixteen million, five hundred five thousand, seven hundred thirty-two".