816464 has 20 divisors (see below), whose sum is σ = 1726080. Its totient is φ = 371040.

The previous prime is 816451. The next prime is 816469. The reversal of 816464 is 464618.

It is a super-2 number, since 2×816464² = 1333226926592, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816469) 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, 2144 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (86304).

2⁸¹⁶⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

816464 is an abundant number, since it is smaller than the sum of its proper divisors (909616).

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

816464 is a wasteful number, since it uses less digits than its factorization.

816464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658 (or 4652 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 816464 is about 903.5839750682. The cubic root of 816464 is about 93.4642833068.

It can be divided in two parts, 8164 and 64, that added together give a palindrome (8228).

The spelling of 816464 in words is "eight hundred sixteen thousand, four hundred sixty-four".