405330020 has 24 divisors (see below), whose sum is σ = 859972344. Its totient is φ = 160459776.

The previous prime is 405330011. The next prime is 405330089. The reversal of 405330020 is 20033504.

It can be written as a sum of positive squares in 4 ways, for example, as 3407716 + 401922304 = 1846^2 + 20048^2 .

It is a super-2 number, since 2×405330020² = 328584850226400800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102527 + ... + 106406.

It is an arithmetic number, because the mean of its divisors is an integer number (35832181).

Almost surely, 2^405330020 is an apocalyptic number.

It is an amenable number.

405330020 is an abundant number, since it is smaller than the sum of its proper divisors (454642324).

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

405330020 is a wasteful number, since it uses less digits than its factorization.

405330020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209039 (or 209037 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 405330020 is about 20132.8095406478. The cubic root of 405330020 is about 740.0645305303.

Adding to 405330020 its reverse (20033504), we get a palindrome (425363524).

The spelling of 405330020 in words is "four hundred five million, three hundred thirty thousand, twenty".