329905020 has 24 divisors (see below), whose sum is σ = 923734224. Its totient is φ = 87974656.

The previous prime is 329905013. The next prime is 329905021. The reversal of 329905020 is 20509923.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329905021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2749149 + ... + 2749268.

It is an arithmetic number, because the mean of its divisors is an integer number (38488926).

Almost surely, 2^329905020 is an apocalyptic number.

329905020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

329905020 is an abundant number, since it is smaller than the sum of its proper divisors (593829204).

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

329905020 is a wasteful number, since it uses less digits than its factorization.

329905020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498429 (or 5498427 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 329905020 is about 18163.2876979912. The cubic root of 329905020 is about 690.9760184578.

The spelling of 329905020 in words is "three hundred twenty-nine million, nine hundred five thousand, twenty".