340781381 has 8 divisors (see below), whose sum is σ = 350161728. Its totient is φ = 331452000.

The previous prime is 340781351. The next prime is 340781387. The reversal of 340781381 is 183187043.

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 340781381 - 2²⁶ = 273672517 is a prime.

It is a super-2 number, since 2×340781381² = 232263899272534322, 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 (340781387) 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, 1016 + ... + 26126.

It is an arithmetic number, because the mean of its divisors is an integer number (43770216).

Almost surely, 2^340781381 is an apocalyptic number.

It is an amenable number.

340781381 is a deficient number, since it is larger than the sum of its proper divisors (9380347).

340781381 is a wasteful number, since it uses less digits than its factorization.

340781381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25483.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 340781381 is about 18460.2649222594. The cubic root of 340781381 is about 698.4874695160.

The spelling of 340781381 in words is "three hundred forty million, seven hundred eighty-one thousand, three hundred eighty-one".