321234140 has 48 divisors (see below), whose sum is σ = 716476320. Its totient is φ = 120637440.

The previous prime is 321234127. The next prime is 321234157. The reversal of 321234140 is 41432123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 39200 + ... + 46680.

It is an arithmetic number, because the mean of its divisors is an integer number (14926590).

Almost surely, 2^321234140 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 321234140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358238160).

321234140 is an abundant number, since it is smaller than the sum of its proper divisors (395242180).

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

321234140 is a wasteful number, since it uses less digits than its factorization.

321234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7622 (or 7620 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 321234140 is about 17923.0058862904. The cubic root of 321234140 is about 684.8685630566.

Adding to 321234140 its reverse (41432123), we get a palindrome (362666263).

It can be divided in two parts, 32123 and 4140, that added together give a palindrome (36263).

The spelling of 321234140 in words is "three hundred twenty-one million, two hundred thirty-four thousand, one hundred forty".