823542042 has 32 divisors (see below), whose sum is σ = 1735096320. Its totient is φ = 259867440.

The previous prime is 823542017. The next prime is 823542043. The reversal of 823542042 is 240245328.

It is not an unprimeable number, because it can be changed into a prime (823542043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242617 + ... + 245987.

It is an arithmetic number, because the mean of its divisors is an integer number (54221760).

Almost surely, 2^823542042 is an apocalyptic number.

823542042 is an abundant number, since it is smaller than the sum of its proper divisors (911554278).

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

823542042 is a wasteful number, since it uses less digits than its factorization.

823542042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5538.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 823542042 is about 28697.4222187290. The cubic root of 823542042 is about 937.3359161010.

The spelling of 823542042 in words is "eight hundred twenty-three million, five hundred forty-two thousand, forty-two".