321368740 has 144 divisors (see below), whose sum is σ = 864444672. Its totient is φ = 98208000.

The previous prime is 321368711. The next prime is 321368759. The reversal of 321368740 is 47863123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321368696 and 321368705.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1033185 + ... + 1033495.

It is an arithmetic number, because the mean of its divisors is an integer number (6003088).

Almost surely, 2^321368740 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 321368740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432222336).

321368740 is an abundant number, since it is smaller than the sum of its proper divisors (543075932).

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

321368740 is a wasteful number, since it uses less digits than its factorization.

321368740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 321368740 is about 17926.7604435380. The cubic root of 321368740 is about 684.9642050665.

The spelling of 321368740 in words is "three hundred twenty-one million, three hundred sixty-eight thousand, seven hundred forty".