326201820 has 144 divisors (see below), whose sum is σ = 1070098848. Its totient is φ = 74027520.

The previous prime is 326201819. The next prime is 326201839. The reversal of 326201820 is 28102623.

It is a congruent number.

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, 531834 + ... + 532446.

It is an arithmetic number, because the mean of its divisors is an integer number (7431242).

Almost surely, 2^326201820 is an apocalyptic number.

326201820 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 326201820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535049424).

326201820 is an abundant number, since it is smaller than the sum of its proper divisors (743897028).

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

326201820 is a wasteful number, since it uses less digits than its factorization.

326201820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 326201820 is about 18061.0581085384. The cubic root of 326201820 is about 688.3808706676.

The spelling of 326201820 in words is "three hundred twenty-six million, two hundred one thousand, eight hundred twenty".