816456 has 16 divisors (see below), whose sum is σ = 2041200. Its totient is φ = 272144.

The previous prime is 816451. The next prime is 816469. The reversal of 816456 is 654618.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (816451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16986 + ... + 17033.

It is an arithmetic number, because the mean of its divisors is an integer number (127575).

2⁸¹⁶⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

816456 is an abundant number, since it is smaller than the sum of its proper divisors (1224744).

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

816456 is a wasteful number, since it uses less digits than its factorization.

816456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34028 (or 34024 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 816456 is about 903.5795482413. The cubic root of 816456 is about 93.4639780406.

The spelling of 816456 in words is "eight hundred sixteen thousand, four hundred fifty-six".