816940608 has 56 divisors (see below), whose sum is σ = 2357993760. Its totient is φ = 247557120.

The previous prime is 816940603. The next prime is 816940633. The reversal of 816940608 is 806049618.

It is a self number, because there is not a number n which added to its sum of digits gives 816940608.

It is not an unprimeable number, because it can be changed into a prime (816940601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191293 + ... + 195516.

Almost surely, 2^816940608 is an apocalyptic number.

816940608 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

816940608 is an abundant number, since it is smaller than the sum of its proper divisors (1541053152).

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

816940608 is a wasteful number, since it uses less digits than its factorization.

816940608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386835 (or 386825 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 816940608 is about 28582.1729055018. The cubic root of 816940608 is about 934.8246625185.

The spelling of 816940608 in words is "eight hundred sixteen million, nine hundred forty thousand, six hundred eight".