13400785 has 16 divisors (see below), whose sum is σ = 16673040. Its totient is φ = 10333440.

The previous prime is 13400767. The next prime is 13400801. The reversal of 13400785 is 58700431.

It can be written as a sum of positive squares in 8 ways, for example, as 641601 + 12759184 = 801^2 + 3572^2 .

It is not a de Polignac number, because 13400785 - 2⁷ = 13400657 is a prime.

It is an unprimeable number.

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, 15751 + ... + 16579.

It is an arithmetic number, because the mean of its divisors is an integer number (1042065).

Almost surely, 2^13400785 is an apocalyptic number.

It is an amenable number.

13400785 is a deficient number, since it is larger than the sum of its proper divisors (3272255).

13400785 is an equidigital number, since it uses as much as digits as its factorization.

13400785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13400785 is about 3660.7082648034. The cubic root of 13400785 is about 237.5254118700.

The spelling of 13400785 in words is "thirteen million, four hundred thousand, seven hundred eighty-five".