823135408 has 20 divisors (see below), whose sum is σ = 1664165808. Its totient is φ = 393673280.

The previous prime is 823135367. The next prime is 823135463. The reversal of 823135408 is 804531328.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118023 + ... + 1118758.

Almost surely, 2^823135408 is an apocalyptic number.

It is an amenable number.

823135408 is an abundant number, since it is smaller than the sum of its proper divisors (841030400).

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

823135408 is a wasteful number, since it uses less digits than its factorization.

823135408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236812 (or 2236806 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 823135408 is about 28690.3364915785. The cubic root of 823135408 is about 937.1816169948.

It can be divided in two parts, 823135 and 408, that added together give a 7-th power (823543 = 7⁷).

The spelling of 823135408 in words is "eight hundred twenty-three million, one hundred thirty-five thousand, four hundred eight".