340808421 has 16 divisors (see below), whose sum is σ = 467647488. Its totient is φ = 220662000.

The previous prime is 340808383. The next prime is 340808459. The reversal of 340808421 is 124808043.

It is an interprime number because it is at equal distance from previous prime (340808383) and next prime (340808459).

It is not a de Polignac number, because 340808421 - 2¹¹ = 340806373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340801421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9246 + ... + 27696.

It is an arithmetic number, because the mean of its divisors is an integer number (29227968).

Almost surely, 2^340808421 is an apocalyptic number.

It is an amenable number.

340808421 is a deficient number, since it is larger than the sum of its proper divisors (126839067).

340808421 is a wasteful number, since it uses less digits than its factorization.

340808421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18632.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 340808421 is about 18460.9972915875. The cubic root of 340808421 is about 698.5059433360.

The spelling of 340808421 in words is "three hundred forty million, eight hundred eight thousand, four hundred twenty-one".