816922790 has 16 divisors (see below), whose sum is σ = 1473292800. Its totient is φ = 326139840.

The previous prime is 816922703. The next prime is 816922807. The reversal of 816922790 is 97229618.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73190 + ... + 83609.

It is an arithmetic number, because the mean of its divisors is an integer number (92080800).

Almost surely, 2^816922790 is an apocalyptic number.

816922790 is a deficient number, since it is larger than the sum of its proper divisors (656370010).

816922790 is a wasteful number, since it uses less digits than its factorization.

816922790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157327.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 816922790 is about 28581.8612060167. The cubic root of 816922790 is about 934.8178660934.

The spelling of 816922790 in words is "eight hundred sixteen million, nine hundred twenty-two thousand, seven hundred ninety".