354240309 has 8 divisors (see below), whose sum is σ = 473568160. Its totient is φ = 235536336.

The previous prime is 354240301. The next prime is 354240343. The reversal of 354240309 is 903042453.

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

It is not a de Polignac number, because 354240309 - 2³ = 354240301 is a prime.

It is a super-3 number, since 3×354240309³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354240301) 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, 154642 + ... + 156915.

It is an arithmetic number, because the mean of its divisors is an integer number (59196020).

Almost surely, 2^354240309 is an apocalyptic number.

It is an amenable number.

354240309 is a deficient number, since it is larger than the sum of its proper divisors (119327851).

354240309 is a wasteful number, since it uses less digits than its factorization.

354240309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311939.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 354240309 is about 18821.2727784281. The cubic root of 354240309 is about 707.5644305301.

The spelling of 354240309 in words is "three hundred fifty-four million, two hundred forty thousand, three hundred nine".