13430978 has 16 divisors (see below), whose sum is σ = 22281696. Its totient is φ = 6020640.

The previous prime is 13430959. The next prime is 13430981. The reversal of 13430978 is 87903431.

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, 2576 + ... + 5787.

It is an arithmetic number, because the mean of its divisors is an integer number (1392606).

Almost surely, 2^13430978 is an apocalyptic number.

13430978 is a deficient number, since it is larger than the sum of its proper divisors (8850718).

13430978 is a wasteful number, since it uses less digits than its factorization.

13430978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8449.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13430978 is about 3664.8298732683. The cubic root of 13430978 is about 237.7036657418.

The spelling of 13430978 in words is "thirteen million, four hundred thirty thousand, nine hundred seventy-eight".