340872905 has 16 divisors (see below), whose sum is σ = 420456960. Its totient is φ = 265167552.

The previous prime is 340872887. The next prime is 340872907. The reversal of 340872905 is 509278043.

It is a cyclic number.

It is not a de Polignac number, because 340872905 - 2¹⁸ = 340610761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (340872907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32276 + ... + 41514.

It is an arithmetic number, because the mean of its divisors is an integer number (26278560).

Almost surely, 2^340872905 is an apocalyptic number.

It is an amenable number.

340872905 is a deficient number, since it is larger than the sum of its proper divisors (79584055).

340872905 is a wasteful number, since it uses less digits than its factorization.

340872905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 340872905 is about 18462.7437018445. The cubic root of 340872905 is about 698.5499950807.

The spelling of 340872905 in words is "three hundred forty million, eight hundred seventy-two thousand, nine hundred five".