39390 has 32 divisors (see below), whose sum is σ = 102816. Its totient is φ = 9600.

The previous prime is 39383. The next prime is 39397. The reversal of 39390 is 9393.

It is an interprime number because it is at equal distance from previous prime (39383) and next prime (39397).

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 39390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340 + ... + 440.

It is an arithmetic number, because the mean of its divisors is an integer number (3213).

2³⁹³⁹⁰ is an apocalyptic number.

39390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51408).

39390 is an abundant number, since it is smaller than the sum of its proper divisors (63426).

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

39390 is a wasteful number, since it uses less digits than its factorization.

39390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124.

The product of its (nonzero) digits is 729, while the sum is 24.

The square root of 39390 is about 198.4691411782. The cubic root of 39390 is about 34.0247800898.

The spelling of 39390 in words is "thirty-nine thousand, three hundred ninety".