325187820 has 144 divisors (see below), whose sum is σ = 1022793408. Its totient is φ = 83566080.

The previous prime is 325187809. The next prime is 325187833. The reversal of 325187820 is 28781523.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1045465 + ... + 1045775.

It is an arithmetic number, because the mean of its divisors is an integer number (7102732).

Almost surely, 2^325187820 is an apocalyptic number.

325187820 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 325187820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511396704).

325187820 is an abundant number, since it is smaller than the sum of its proper divisors (697605588).

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

325187820 is a wasteful number, since it uses less digits than its factorization.

325187820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 325187820 is about 18032.9648144724. The cubic root of 325187820 is about 687.6668518444. Note that the first 3 decimals are identical.

The spelling of 325187820 in words is "three hundred twenty-five million, one hundred eighty-seven thousand, eight hundred twenty".