816863862 has 32 divisors (see below), whose sum is σ = 1684552320. Its totient is φ = 263914560.

The previous prime is 816863771. The next prime is 816863863. The reversal of 816863862 is 268368618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816863863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21714 + ... + 45882.

It is an arithmetic number, because the mean of its divisors is an integer number (52642260).

Almost surely, 2^816863862 is an apocalyptic number.

816863862 is an abundant number, since it is smaller than the sum of its proper divisors (867688458).

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

816863862 is a wasteful number, since it uses less digits than its factorization.

816863862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24348.

The product of its digits is 663552, while the sum is 48.

The square root of 816863862 is about 28580.8303238377. The cubic root of 816863862 is about 934.7953881340.

The spelling of 816863862 in words is "eight hundred sixteen million, eight hundred sixty-three thousand, eight hundred sixty-two".