816377860 has 24 divisors (see below), whose sum is σ = 1721517336. Its totient is φ = 325194240.

The previous prime is 816377857. The next prime is 816377911. The reversal of 816377860 is 68773618.

It can be written as a sum of positive squares in 4 ways, for example, as 86081284 + 730296576 = 9278^2 + 27024^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 816377860.

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, 79867 + ... + 89506.

It is an arithmetic number, because the mean of its divisors is an integer number (71729889).

Almost surely, 2^816377860 is an apocalyptic number.

It is an amenable number.

816377860 is an abundant number, since it is smaller than the sum of its proper divisors (905139476).

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

816377860 is a wasteful number, since it uses less digits than its factorization.

816377860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169623 (or 169621 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 816377860 is about 28572.3268215944. The cubic root of 816377860 is about 934.6099624760.

The spelling of 816377860 in words is "eight hundred sixteen million, three hundred seventy-seven thousand, eight hundred sixty".