823533972 has 48 divisors (see below), whose sum is σ = 1986969600. Its totient is φ = 265200480.

The previous prime is 823533959. The next prime is 823533973. The reversal of 823533972 is 279335328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823533973) 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, 265929 + ... + 269007.

It is an arithmetic number, because the mean of its divisors is an integer number (41395200).

Almost surely, 2^823533972 is an apocalyptic number.

It is an amenable number.

823533972 is an abundant number, since it is smaller than the sum of its proper divisors (1163435628).

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

823533972 is a wasteful number, since it uses less digits than its factorization.

823533972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836 (or 3834 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 823533972 is about 28697.2816134212. The cubic root of 823533972 is about 937.3328543972.

The spelling of 823533972 in words is "eight hundred twenty-three million, five hundred thirty-three thousand, nine hundred seventy-two".