340637381 has 8 divisors (see below), whose sum is σ = 412200000. Its totient is φ = 274799808.

The previous prime is 340637369. The next prime is 340637399. The reversal of 340637381 is 183736043.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 340637381 - 2¹⁰ = 340636357 is a prime.

It is a super-2 number, since 2×340637381² = 232067650669078322, which contains 22 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 (340637321) 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, 1431131 + ... + 1431368.

It is an arithmetic number, because the mean of its divisors is an integer number (51525000).

Almost surely, 2^340637381 is an apocalyptic number.

It is an amenable number.

340637381 is a deficient number, since it is larger than the sum of its proper divisors (71562619).

340637381 is a wasteful number, since it uses less digits than its factorization.

340637381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862523.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 340637381 is about 18456.3642410958. The cubic root of 340637381 is about 698.3890717632.

The spelling of 340637381 in words is "three hundred forty million, six hundred thirty-seven thousand, three hundred eighty-one".