823922538 has 32 divisors (see below), whose sum is σ = 1709847360. Its totient is φ = 264364800.

The previous prime is 823922531. The next prime is 823922563. The reversal of 823922538 is 835229328.

It is a super-2 number, since 2×823922538² = 1357696697248722888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 823922538.

It is not an unprimeable number, because it can be changed into a prime (823922531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51613 + ... + 65663.

It is an arithmetic number, because the mean of its divisors is an integer number (53432730).

Almost surely, 2^823922538 is an apocalyptic number.

823922538 is an abundant number, since it is smaller than the sum of its proper divisors (885924822).

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

823922538 is a wasteful number, since it uses less digits than its factorization.

823922538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14422.

The product of its digits is 207360, while the sum is 42.

The square root of 823922538 is about 28704.0508987843. The cubic root of 823922538 is about 937.4802510329.

The spelling of 823922538 in words is "eight hundred twenty-three million, nine hundred twenty-two thousand, five hundred thirty-eight".