326620720 has 20 divisors (see below), whose sum is σ = 759393360. Its totient is φ = 130648256.

The previous prime is 326620709. The next prime is 326620727. The reversal of 326620720 is 27026623.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (326620727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041300 + ... + 2041459.

It is an arithmetic number, because the mean of its divisors is an integer number (37969668).

Almost surely, 2^326620720 is an apocalyptic number.

It is an amenable number.

326620720 is an abundant number, since it is smaller than the sum of its proper divisors (432772640).

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

326620720 is a wasteful number, since it uses less digits than its factorization.

326620720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082772 (or 4082766 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 326620720 is about 18072.6511613543. The cubic root of 326620720 is about 688.6754116348.

The spelling of 326620720 in words is "three hundred twenty-six million, six hundred twenty thousand, seven hundred twenty".