816440629 has 8 divisors (see below), whose sum is σ = 825144320. Its totient is φ = 807759216.

The previous prime is 816440609. The next prime is 816440633. The reversal of 816440629 is 926044618.

816440629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816440629 - 2⁹ = 816440117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816440591 and 816440600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816440609) 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, 74092 + ... + 84394.

It is an arithmetic number, because the mean of its divisors is an integer number (103143040).

Almost surely, 2^816440629 is an apocalyptic number.

It is an amenable number.

816440629 is a deficient number, since it is larger than the sum of its proper divisors (8703691).

816440629 is a wasteful number, since it uses less digits than its factorization.

816440629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 816440629 is about 28573.4252234484. The cubic root of 816440629 is about 934.6339150402.

The spelling of 816440629 in words is "eight hundred sixteen million, four hundred forty thousand, six hundred twenty-nine".