864923004 has 216 divisors, whose sum is σ = 2561963040. Its totient is φ = 245329920.

The previous prime is 864922987. The next prime is 864923011. The reversal of 864923004 is 400329468.

It is a happy number.

864923004 is a `hidden beast` number, since 8 + 649 + 2 + 3 + 0 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 864923004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8916684 + ... + 8916780.

It is an arithmetic number, because the mean of its divisors is an integer number (11860940).

Almost surely, 2^864923004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864923004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280981520).

864923004 is an abundant number, since it is smaller than the sum of its proper divisors (1697040036).

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

864923004 is a wasteful number, since it uses less digits than its factorization.

864923004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 864923004 is about 29409.5733393057. The cubic root of 864923004 is about 952.7796719412.

The spelling of 864923004 in words is "eight hundred sixty-four million, nine hundred twenty-three thousand, four".