340420320 has 120 divisors (see below), whose sum is σ = 1201445784. Its totient is φ = 90775296.

The previous prime is 340420303. The next prime is 340420351. The reversal of 340420320 is 23024043.

340420320 is a `hidden beast` number, since 340 + 4 + 2 + 0 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 340420293 and 340420302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 174 + ... + 26093.

Almost surely, 2^340420320 is an apocalyptic number.

340420320 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 340420320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600722892).

340420320 is an abundant number, since it is smaller than the sum of its proper divisors (861025464).

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

340420320 is a wasteful number, since it uses less digits than its factorization.

340420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26294 (or 26277 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 340420320 is about 18450.4829205092. The cubic root of 340420320 is about 698.2406977155.

Adding to 340420320 its reverse (23024043), we get a palindrome (363444363).

The spelling of 340420320 in words is "three hundred forty million, four hundred twenty thousand, three hundred twenty".