340391408 has 160 divisors (see below), whose sum is σ = 845660160. Its totient is φ = 129392640.

The previous prime is 340391393. The next prime is 340391411. The reversal of 340391408 is 804193043.

340391408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 4308713 + ... + 4308791.

It is an arithmetic number, because the mean of its divisors is an integer number (5285376).

Almost surely, 2^340391408 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 340391408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422830080).

340391408 is an abundant number, since it is smaller than the sum of its proper divisors (505268752).

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

340391408 is a wasteful number, since it uses less digits than its factorization.

340391408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 340391408 is about 18449.6994013453. The cubic root of 340391408 is about 698.2209298918.

The spelling of 340391408 in words is "three hundred forty million, three hundred ninety-one thousand, four hundred eight".