900638 has 16 divisors (see below), whose sum is σ = 1440720. Its totient is φ = 421056.

The previous prime is 900623. The next prime is 900649. The reversal of 900638 is 836009.

It is a happy number.

It is a super-2 number, since 2×900638² = 1622297614088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

900638 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, 5120 + ... + 5292.

It is an arithmetic number, because the mean of its divisors is an integer number (90045).

2⁹⁰⁰⁶³⁸ is an apocalyptic number.

900638 is a deficient number, since it is larger than the sum of its proper divisors (540082).

900638 is a wasteful number, since it uses less digits than its factorization.

900638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 900638 is about 949.0194940042. The cubic root of 900638 is about 96.5717472284.

The spelling of 900638 in words is "nine hundred thousand, six hundred thirty-eight".