326401240 has 64 divisors (see below), whose sum is σ = 814367520. Its totient is φ = 116736000.

The previous prime is 326401213. The next prime is 326401249. The reversal of 326401240 is 42104623.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326401249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20760 + ... + 32920.

Almost surely, 2^326401240 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 326401240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407183760).

326401240 is an abundant number, since it is smaller than the sum of its proper divisors (487966280).

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

326401240 is a wasteful number, since it uses less digits than its factorization.

326401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12244 (or 12240 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 326401240 is about 18066.5779825622. The cubic root of 326401240 is about 688.5211201901.

Adding to 326401240 its reverse (42104623), we get a palindrome (368505863).

The spelling of 326401240 in words is "three hundred twenty-six million, four hundred one thousand, two hundred forty".