339720 has 64 divisors (see below), whose sum is σ = 1080000. Its totient is φ = 85248.

The previous prime is 339707. The next prime is 339727. The reversal of 339720 is 27933.

Added to its reverse (27933) it gives a triangular number (367653 = T₈₅₇).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (339727) by changing a digit.

339720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2206 + ... + 2354.

It is an arithmetic number, because the mean of its divisors is an integer number (16875).

2³³⁹⁷²⁰ is an apocalyptic number.

339720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 339720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540000).

339720 is an abundant number, since it is smaller than the sum of its proper divisors (740280).

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

339720 is a wasteful number, since it uses less digits than its factorization.

339720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 339720 is about 582.8550420130. The cubic root of 339720 is about 69.7761557075.

Adding to 339720 its reverse (27933), we get a triangular number (367653 = T₈₅₇).

The spelling of 339720 in words is "three hundred thirty-nine thousand, seven hundred twenty".