326781020 has 24 divisors (see below), whose sum is σ = 690039168. Its totient is φ = 129988800.

The previous prime is 326781017. The next prime is 326781041. The reversal of 326781020 is 20187623.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41516 + ... + 48755.

It is an arithmetic number, because the mean of its divisors is an integer number (28751632).

Almost surely, 2^326781020 is an apocalyptic number.

It is an amenable number.

326781020 is an abundant number, since it is smaller than the sum of its proper divisors (363258148).

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

326781020 is a wasteful number, since it uses less digits than its factorization.

326781020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90461 (or 90459 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 326781020 is about 18077.0854951787. The cubic root of 326781020 is about 688.7880566761.

The spelling of 326781020 in words is "three hundred twenty-six million, seven hundred eighty-one thousand, twenty".