19390 has 16 divisors (see below), whose sum is σ = 40032. Its totient is φ = 6624.

The previous prime is 19387. The next prime is 19391. The reversal of 19390 is 9391.

19390 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 208.

It is an arithmetic number, because the mean of its divisors is an integer number (2502).

2¹⁹³⁹⁰ is an apocalyptic number.

19390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19390 is the 70-th decagonal number.

19390 is an abundant number, since it is smaller than the sum of its proper divisors (20642).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20016).

19390 is a wasteful number, since it uses less digits than its factorization.

19390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 19390 is about 139.2479802367. The cubic root of 19390 is about 26.8653561937.

Subtracting from 19390 its reverse (9391), we obtain a palindrome (9999).

The spelling of 19390 in words is "nineteen thousand, three hundred ninety".