325729920 has 128 divisors (see below), whose sum is σ = 1093032000. Its totient is φ = 82280448.

The previous prime is 325729883. The next prime is 325729951. The reversal of 325729920 is 29927523.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32016 + ... + 40944.

Almost surely, 2^325729920 is an apocalyptic number.

325729920 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 325729920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (546516000).

325729920 is an abundant number, since it is smaller than the sum of its proper divisors (767302080).

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

325729920 is a wasteful number, since it uses less digits than its factorization.

325729920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970 (or 8958 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 325729920 is about 18047.9893616990. The cubic root of 325729920 is about 688.0487616422.

The spelling of 325729920 in words is "three hundred twenty-five million, seven hundred twenty-nine thousand, nine hundred twenty".