823976405 has 12 divisors (see below), whose sum is σ = 1150204140. Its totient is φ = 565012224.

The previous prime is 823976393. The next prime is 823976423. The reversal of 823976405 is 504679328.

823976405 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 2 ways, for example, as 216501796 + 607474609 = 14714^2 + 24647^2 .

It is not a de Polignac number, because 823976405 - 2⁸ = 823976149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1681340 + ... + 1681829.

It is an arithmetic number, because the mean of its divisors is an integer number (95850345).

Almost surely, 2^823976405 is an apocalyptic number.

It is an amenable number.

823976405 is a deficient number, since it is larger than the sum of its proper divisors (326227735).

823976405 is a wasteful number, since it uses less digits than its factorization.

823976405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363188 (or 3363181 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 823976405 is about 28704.9892004857. The cubic root of 823976405 is about 937.5006810069.

The spelling of 823976405 in words is "eight hundred twenty-three million, nine hundred seventy-six thousand, four hundred five".