816913388 has 12 divisors (see below), whose sum is σ = 1432903080. Its totient is φ = 407512512.

The previous prime is 816913387. The next prime is 816913429. The reversal of 816913388 is 883319618.

It is a happy number.

816913388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (816913381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234098 + ... + 237561.

It is an arithmetic number, because the mean of its divisors is an integer number (119408590).

Almost surely, 2^816913388 is an apocalyptic number.

It is an amenable number.

816913388 is a deficient number, since it is larger than the sum of its proper divisors (615989692).

816913388 is a wasteful number, since it uses less digits than its factorization.

816913388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472096 (or 472094 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 816913388 is about 28581.6967306002. The cubic root of 816913388 is about 934.8142797931.

The spelling of 816913388 in words is "eight hundred sixteen million, nine hundred thirteen thousand, three hundred eighty-eight".