900280 has 32 divisors (see below), whose sum is σ = 2060640. Its totient is φ = 353920.

The previous prime is 900259. The next prime is 900283. The reversal of 900280 is 82009.

It is a super-4 number, since 4×900280⁴ (a number of 25 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900283) by changing a digit.

900280 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (64395).

2⁹⁰⁰²⁸⁰ 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 900280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030320).

900280 is an abundant number, since it is smaller than the sum of its proper divisors (1160360).

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

900280 is a wasteful number, since it uses less digits than its factorization.

900280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 900280 is about 948.8308595319. The cubic root of 900280 is about 96.5589499049.

Adding to 900280 its reverse (82009), we get a palindrome (982289).

The spelling of 900280 in words is "nine hundred thousand, two hundred eighty".