816082405 has 8 divisors (see below), whose sum is σ = 982107000. Its totient is φ = 650993856.

The previous prime is 816082391. The next prime is 816082427. The reversal of 816082405 is 504280618.

816082405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 286760356 + 529322049 = 16934^2 + 23007^2 .

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 816082405 - 2⁵ = 816082373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232090 + ... + 235579.

It is an arithmetic number, because the mean of its divisors is an integer number (122763375).

Almost surely, 2^816082405 is an apocalyptic number.

It is an amenable number.

816082405 is a deficient number, since it is larger than the sum of its proper divisors (166024595).

816082405 is a wasteful number, since it uses less digits than its factorization.

816082405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468023.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 816082405 is about 28567.1560537622. The cubic root of 816082405 is about 934.4972007600.

The spelling of 816082405 in words is "eight hundred sixteen million, eighty-two thousand, four hundred five".