900812 has 24 divisors (see below), whose sum is σ = 1753920. Its totient is φ = 401360.

The previous prime is 900803. The next prime is 900817. The reversal of 900812 is 218009.

It is a super-2 number, since 2×900812² = 1622924518688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (900817) by changing a digit.

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, 2423 + ... + 2769.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2⁹⁰⁰⁸¹² is an apocalyptic number.

It is an amenable number.

900812 is a deficient number, since it is larger than the sum of its proper divisors (853108).

900812 is a wasteful number, since it uses less digits than its factorization.

900812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 900812 is about 949.1111631416. Note that the first 4 decimals coincide. The cubic root of 900812 is about 96.5779659318.

The spelling of 900812 in words is "nine hundred thousand, eight hundred twelve".