321049660 has 12 divisors (see below), whose sum is σ = 674204328. Its totient is φ = 128419856.

The previous prime is 321049657. The next prime is 321049667. The reversal of 321049660 is 66940123.

It is a super-2 number, since 2×321049660² = 206145768372231200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321049667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8026222 + ... + 8026261.

It is an arithmetic number, because the mean of its divisors is an integer number (56183694).

Almost surely, 2^321049660 is an apocalyptic number.

It is an amenable number.

321049660 is an abundant number, since it is smaller than the sum of its proper divisors (353154668).

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

321049660 is a wasteful number, since it uses less digits than its factorization.

321049660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16052492 (or 16052490 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 321049660 is about 17917.8586890287. The cubic root of 321049660 is about 684.7374346673.

Adding to 321049660 its reverse (66940123), we get a palindrome (387989783).

The spelling of 321049660 in words is "three hundred twenty-one million, forty-nine thousand, six hundred sixty".