325731840 has 320 divisors, whose sum is σ = 1220921856. Its totient is φ = 72548352.

The previous prime is 325731827. The next prime is 325731841. The reversal of 325731840 is 48137523.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×325731840² = 212202463179571200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325731841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3924439 + ... + 3924521.

Almost surely, 2^325731840 is an apocalyptic number.

325731840 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 325731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610460928).

325731840 is an abundant number, since it is smaller than the sum of its proper divisors (895190016).

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

325731840 is an equidigital number, since it uses as much as digits as its factorization.

325731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 325731840 is about 18048.0425531413. The cubic root of 325731840 is about 688.0501135301.

The spelling of 325731840 in words is "three hundred twenty-five million, seven hundred thirty-one thousand, eight hundred forty".