190638 has 48 divisors (see below), whose sum is σ = 505440. Its totient is φ = 50688.

The previous prime is 190633. The next prime is 190639. The reversal of 190638 is 836091.

190638 is nontrivially palindromic in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2098 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2¹⁹⁰⁶³⁸ is an apocalyptic number.

190638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252720).

190638 is an abundant number, since it is smaller than the sum of its proper divisors (314802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

190638 is a wasteful number, since it uses less digits than its factorization.

190638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 190638 is about 436.6211172172. The cubic root of 190638 is about 57.5532462038.

It can be divided in two parts, 190 and 638, that added together give a palindrome (828).

The spelling of 190638 in words is "one hundred ninety thousand, six hundred thirty-eight".