343940878 has 16 divisors (see below), whose sum is σ = 528756480. Its totient is φ = 167741496.

The previous prime is 343940819. The next prime is 343940897. The reversal of 343940878 is 878049343.

343940878 is a nontrivial binomial coefficient, being equal to C(26228, 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 26227.

It is an arithmetic number, because the mean of its divisors is an integer number (33047280).

Almost surely, 2^343940878 is an apocalyptic number.

343940878 is the 26227-th triangular number and also the 13114-th hexagonal number.

343940878 is the 8743-rd centered nonagonal number.

343940878 is a deficient number, since it is larger than the sum of its proper divisors (184815602).

343940878 is a wasteful number, since it uses less digits than its factorization.

343940878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26391.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 343940878 is about 18545.6431002001. The cubic root of 343940878 is about 700.6394687116.

The spelling of 343940878 in words is "three hundred forty-three million, nine hundred forty thousand, eight hundred seventy-eight".