816323740 has 12 divisors (see below), whose sum is σ = 1714279896. Its totient is φ = 326529488.

The previous prime is 816323737. The next prime is 816323743. The reversal of 816323740 is 47323618.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (816323737) and next prime (816323743).

It is a junction number, because it is equal to n+sod(n) for n = 816323696 and 816323705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816323743) 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, 20408074 + ... + 20408113.

It is an arithmetic number, because the mean of its divisors is an integer number (142856658).

Almost surely, 2^816323740 is an apocalyptic number.

It is an amenable number.

816323740 is an abundant number, since it is smaller than the sum of its proper divisors (897956156).

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

816323740 is a wasteful number, since it uses less digits than its factorization.

816323740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40816196 (or 40816194 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 816323740 is about 28571.3797356725. The cubic root of 816323740 is about 934.5893093727.

The spelling of 816323740 in words is "eight hundred sixteen million, three hundred twenty-three thousand, seven hundred forty".