890138 has 4 divisors (see below), whose sum is σ = 1335210. Its totient is φ = 445068.

The previous prime is 890129. The next prime is 890147. The reversal of 890138 is 831098.

It is a happy number.

890138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (890129) and next prime (890147).

It can be written as a sum of positive squares in only one way, i.e., 693889 + 196249 = 833^2 + 443^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 890138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222533 + ... + 222536.

2⁸⁹⁰¹³⁸ is an apocalyptic number.

890138 is a deficient number, since it is larger than the sum of its proper divisors (445072).

890138 is a wasteful number, since it uses less digits than its factorization.

890138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445071.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 890138 is about 943.4712502244. The cubic root of 890138 is about 96.1949885227.

The spelling of 890138 in words is "eight hundred ninety thousand, one hundred thirty-eight".