321372740 has 48 divisors (see below), whose sum is σ = 730919280. Its totient is φ = 117987840.

The previous prime is 321372731. The next prime is 321372773. The reversal of 321372740 is 47273123.

It can be written as a sum of positive squares in 8 ways, for example, as 98049604 + 223323136 = 9902^2 + 14944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43646 + ... + 50474.

It is an arithmetic number, because the mean of its divisors is an integer number (15227485).

Almost surely, 2^321372740 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 321372740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365459640).

321372740 is an abundant number, since it is smaller than the sum of its proper divisors (409546540).

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

321372740 is a wasteful number, since it uses less digits than its factorization.

321372740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 321372740 is about 17926.8720082451. The cubic root of 321372740 is about 684.9670469167.

The spelling of 321372740 in words is "three hundred twenty-one million, three hundred seventy-two thousand, seven hundred forty".