321140904 has 192 divisors, whose sum is σ = 1008599040. Its totient is φ = 84712320.

The previous prime is 321140903. The next prime is 321140917. The reversal of 321140904 is 409041123.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321140903) 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 47 ways as a sum of consecutive naturals, for example, 838297 + ... + 838679.

It is an arithmetic number, because the mean of its divisors is an integer number (5253120).

Almost surely, 2^321140904 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 321140904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504299520).

321140904 is an abundant number, since it is smaller than the sum of its proper divisors (687458136).

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

321140904 is a wasteful number, since it uses less digits than its factorization.

321140904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 321140904 is about 17920.4046829306. The cubic root of 321140904 is about 684.8022971816.

The spelling of 321140904 in words is "three hundred twenty-one million, one hundred forty thousand, nine hundred four".