816271870 has 16 divisors (see below), whose sum is σ = 1505126448. Its totient is φ = 318544960.

The previous prime is 816271867. The next prime is 816271871. The reversal of 816271870 is 78172618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816271871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995044 + ... + 995863.

It is an arithmetic number, because the mean of its divisors is an integer number (94070403).

Almost surely, 2^816271870 is an apocalyptic number.

816271870 is a deficient number, since it is larger than the sum of its proper divisors (688854578).

816271870 is a wasteful number, since it uses less digits than its factorization.

816271870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990955.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 816271870 is about 28570.4719947011. The cubic root of 816271870 is about 934.5695140505.

The spelling of 816271870 in words is "eight hundred sixteen million, two hundred seventy-one thousand, eight hundred seventy".