905020 has 24 divisors (see below), whose sum is σ = 1953504. Its totient is φ = 351936.

The previous prime is 905011. The next prime is 905053. The reversal of 905020 is 20509.

It is a super-2 number, since 2×905020² = 1638122400800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 904985 and 905003.

It is a congruent number.

It is an unprimeable number.

905020 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 129 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (81396).

2⁹⁰⁵⁰²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 905020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976752).

905020 is an abundant number, since it is smaller than the sum of its proper divisors (1048484).

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

905020 is a wasteful number, since it uses less digits than its factorization.

905020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 905020 is about 951.3253912306. The cubic root of 905020 is about 96.7281152441.

Adding to 905020 its reverse (20509), we get a palindrome (925529).

The spelling of 905020 in words is "nine hundred five thousand, twenty".