816679572 has 12 divisors (see below), whose sum is σ = 1905585696. Its totient is φ = 272226520.

The previous prime is 816679571. The next prime is 816679583. The reversal of 816679572 is 275976618.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816679571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34028304 + ... + 34028327.

It is an arithmetic number, because the mean of its divisors is an integer number (158798808).

Almost surely, 2^816679572 is an apocalyptic number.

It is an amenable number.

816679572 is an abundant number, since it is smaller than the sum of its proper divisors (1088906124).

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

816679572 is a wasteful number, since it uses less digits than its factorization.

816679572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68056638 (or 68056636 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 816679572 is about 28577.6061278757. The cubic root of 816679572 is about 934.7250841307.

The spelling of 816679572 in words is "eight hundred sixteen million, six hundred seventy-nine thousand, five hundred seventy-two".