890638 has 8 divisors (see below), whose sum is σ = 1526832. Its totient is φ = 381696.

The previous prime is 890609. The next prime is 890653. The reversal of 890638 is 836098.

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

It is a congruent number.

It is an unprimeable number.

890638 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31795 + ... + 31822.

It is an arithmetic number, because the mean of its divisors is an integer number (190854).

2⁸⁹⁰⁶³⁸ is an apocalyptic number.

890638 is a deficient number, since it is larger than the sum of its proper divisors (636194).

890638 is a wasteful number, since it uses less digits than its factorization.

890638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63626.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 890638 is about 943.7361919520. The cubic root of 890638 is about 96.2129964014.

The spelling of 890638 in words is "eight hundred ninety thousand, six hundred thirty-eight".