321032340 has 72 divisors (see below), whose sum is σ = 978949608. Its totient is φ = 85155840.

The previous prime is 321032339. The next prime is 321032347. The reversal of 321032340 is 43230123.

321032340 is a `hidden beast` number, since 321 + 0 + 3 + 2 + 340 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 81216144 + 239816196 = 9012^2 + 15486^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321032347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30120 + ... + 39360.

Almost surely, 2^321032340 is an apocalyptic number.

321032340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321032340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489474804).

321032340 is an abundant number, since it is smaller than the sum of its proper divisors (657917268).

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

321032340 is a wasteful number, since it uses less digits than its factorization.

321032340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449 (or 9444 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 321032340 is about 17917.3753658286. The cubic root of 321032340 is about 684.7251210316.

Adding to 321032340 its reverse (43230123), we get a palindrome (364262463).

It can be divided in two parts, 32103 and 2340, that added together give a palindrome (34443).

The spelling of 321032340 in words is "three hundred twenty-one million, thirty-two thousand, three hundred forty".