816235240 has 32 divisors (see below), whose sum is σ = 1839710880. Its totient is φ = 325928512.

The previous prime is 816235213. The next prime is 816235249. The reversal of 816235240 is 42532618.

It is not an unprimeable number, because it can be changed into a prime (816235249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6099 + ... + 40861.

It is an arithmetic number, because the mean of its divisors is an integer number (57490965).

Almost surely, 2^816235240 is an apocalyptic number.

It is an amenable number.

816235240 is an abundant number, since it is smaller than the sum of its proper divisors (1023475640).

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

816235240 is a wasteful number, since it uses less digits than its factorization.

816235240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35361 (or 35357 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 816235240 is about 28569.8309410469. The cubic root of 816235240 is about 934.5555343154. Note that the first 4 decimals are identical.

Adding to 816235240 its reverse (42532618), we get a palindrome (858767858).

The spelling of 816235240 in words is "eight hundred sixteen million, two hundred thirty-five thousand, two hundred forty".