816903854 has 16 divisors (see below), whose sum is σ = 1320664128. Its totient is φ = 376732512.

The previous prime is 816903853. The next prime is 816903863. The reversal of 816903854 is 458309618.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816903853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22664 + ... + 46340.

It is an arithmetic number, because the mean of its divisors is an integer number (82541508).

Almost surely, 2^816903854 is an apocalyptic number.

816903854 is a deficient number, since it is larger than the sum of its proper divisors (503760274).

816903854 is a wasteful number, since it uses less digits than its factorization.

816903854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25019.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 816903854 is about 28581.5299450537. The cubic root of 816903854 is about 934.8106431146.

The spelling of 816903854 in words is "eight hundred sixteen million, nine hundred three thousand, eight hundred fifty-four".