340338021 has 8 divisors (see below), whose sum is σ = 453869280. Its totient is φ = 226849392.

The previous prime is 340338017. The next prime is 340338041. The reversal of 340338021 is 120833043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 340338021 - 2² = 340338017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340337982 and 340338000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340338001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25510 + ... + 36488.

It is an arithmetic number, because the mean of its divisors is an integer number (56733660).

Almost surely, 2^340338021 is an apocalyptic number.

It is an amenable number.

340338021 is a deficient number, since it is larger than the sum of its proper divisors (113531259).

340338021 is a wasteful number, since it uses less digits than its factorization.

340338021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21315.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 340338021 is about 18448.2525188702. The cubic root of 340338021 is about 698.1844249851.

The spelling of 340338021 in words is "three hundred forty million, three hundred thirty-eight thousand, twenty-one".