13489785 has 24 divisors (see below), whose sum is σ = 24190920. Its totient is φ = 6945792.

The previous prime is 13489783. The next prime is 13489837. The reversal of 13489785 is 58798431.

13489785 = T₉₅₀ + T₉₅₁ + ... + T₉₇₈.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 13461561 = 168^2 + 3669^2 .

It is not a de Polignac number, because 13489785 - 2¹ = 13489783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13489785.

It is not an unprimeable number, because it can be changed into a prime (13489781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3864 + ... + 6473.

It is an arithmetic number, because the mean of its divisors is an integer number (1007955).

Almost surely, 2^13489785 is an apocalyptic number.

13489785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13489785 is a deficient number, since it is larger than the sum of its proper divisors (10701135).

13489785 is a wasteful number, since it uses less digits than its factorization.

13489785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10377 (or 10374 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 13489785 is about 3672.8442656884. The cubic root of 13489785 is about 238.0500859681.

The spelling of 13489785 in words is "thirteen million, four hundred eighty-nine thousand, seven hundred eighty-five".