823712004 has 60 divisors (see below), whose sum is σ = 2156489104. Its totient is φ = 274170096.

The previous prime is 823711991. The next prime is 823712009. The reversal of 823712004 is 400217328.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (823712009) 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 19 ways as a sum of consecutive naturals, for example, 292467 + ... + 295269.

Almost surely, 2^823712004 is an apocalyptic number.

It is an amenable number.

823712004 is an abundant number, since it is smaller than the sum of its proper divisors (1332777100).

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

823712004 is a wasteful number, since it uses less digits than its factorization.

823712004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726 (or 3715 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 823712004 is about 28700.3833423876. The cubic root of 823712004 is about 937.4003938976.

The spelling of 823712004 in words is "eight hundred twenty-three million, seven hundred twelve thousand, four".