900890 has 8 divisors (see below), whose sum is σ = 1621620. Its totient is φ = 360352.

The previous prime is 900869. The next prime is 900917. The reversal of 900890 is 98009.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 900601 + 289 = 949^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 45035 + ... + 45054.

2⁹⁰⁰⁸⁹⁰ is an apocalyptic number.

900890 is a deficient number, since it is larger than the sum of its proper divisors (720730).

900890 is a wasteful number, since it uses less digits than its factorization.

900890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90096.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 900890 is about 949.1522533293. The cubic root of 900890 is about 96.5807533666.

Adding to 900890 its reverse (98009), we get a palindrome (998899).

The spelling of 900890 in words is "nine hundred thousand, eight hundred ninety".