340788681 has 32 divisors (see below), whose sum is σ = 545978880. Its totient is φ = 209265408.

The previous prime is 340788667. The next prime is 340788689. The reversal of 340788681 is 186887043.

It is not a de Polignac number, because 340788681 - 2¹⁴ = 340772297 is a prime.

It is a super-2 number, since 2×340788681² = 232273850195439522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340788689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13675 + ... + 29471.

It is an arithmetic number, because the mean of its divisors is an integer number (17061840).

Almost surely, 2^340788681 is an apocalyptic number.

It is an amenable number.

340788681 is a deficient number, since it is larger than the sum of its proper divisors (205190199).

340788681 is a wasteful number, since it uses less digits than its factorization.

340788681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870 (or 15864 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 340788681 is about 18460.4626431734. The cubic root of 340788681 is about 698.4924569971.

The spelling of 340788681 in words is "three hundred forty million, seven hundred eighty-eight thousand, six hundred eighty-one".