340206440 has 128 divisors (see below), whose sum is σ = 900979200. Its totient is φ = 113218560.

The previous prime is 340206439. The next prime is 340206443. The reversal of 340206440 is 44602043.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (340206443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2166842 + ... + 2166998.

It is an arithmetic number, because the mean of its divisors is an integer number (7038900).

Almost surely, 2^340206440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340206440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450489600).

340206440 is an abundant number, since it is smaller than the sum of its proper divisors (560772760).

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

340206440 is a wasteful number, since it uses less digits than its factorization.

340206440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 340206440 is about 18444.6859555808. The cubic root of 340206440 is about 698.0944363650.

Adding to 340206440 its reverse (44602043), we get a palindrome (384808483).

The spelling of 340206440 in words is "three hundred forty million, two hundred six thousand, four hundred forty".