900450 has 96 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 221760.

The previous prime is 900443. The next prime is 900461. The reversal of 900450 is 54009.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

900450 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 47 ways as a sum of consecutive naturals, for example, 31036 + ... + 31064.

It is an arithmetic number, because the mean of its divisors is an integer number (27900).

2⁹⁰⁰⁴⁵⁰ is an apocalyptic number.

900450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 900450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339200).

900450 is an abundant number, since it is smaller than the sum of its proper divisors (1777950).

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

900450 is a wasteful number, since it uses less digits than its factorization.

900450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 900450 is about 948.9204392361. The cubic root of 900450 is about 96.5650272691.

Adding to 900450 its reverse (54009), we get a palindrome (954459).

The spelling of 900450 in words is "nine hundred thousand, four hundred fifty".