816757090 has 16 divisors (see below), whose sum is σ = 1470850488. Its totient is φ = 326550016.

The previous prime is 816757079. The next prime is 816757103. The reversal of 816757090 is 90757618.

816757090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 802985569 + 13771521 = 28337^2 + 3711^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4764 + ... + 40696.

Almost surely, 2^816757090 is an apocalyptic number.

816757090 is a deficient number, since it is larger than the sum of its proper divisors (654093398).

816757090 is a wasteful number, since it uses less digits than its factorization.

816757090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38213.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 816757090 is about 28578.9623674478. The cubic root of 816757090 is about 934.7546574293.

The spelling of 816757090 in words is "eight hundred sixteen million, seven hundred fifty-seven thousand, ninety".