340689720 has 128 divisors (see below), whose sum is σ = 1173657600. Its totient is φ = 77500416.

The previous prime is 340689719. The next prime is 340689733. The reversal of 340689720 is 27986043.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199912 + ... + 201608.

It is an arithmetic number, because the mean of its divisors is an integer number (9169200).

Almost surely, 2^340689720 is an apocalyptic number.

340689720 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 340689720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586828800).

340689720 is an abundant number, since it is smaller than the sum of its proper divisors (832967880).

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

340689720 is a wasteful number, since it uses less digits than its factorization.

340689720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 340689720 is about 18457.7820986163. The cubic root of 340689720 is about 698.4248391371.

The spelling of 340689720 in words is "three hundred forty million, six hundred eighty-nine thousand, seven hundred twenty".