13640674 has 16 divisors (see below), whose sum is σ = 20849400. Its totient is φ = 6692224.

The previous prime is 13640639. The next prime is 13640677. The reversal of 13640674 is 47604631.

It can be written as a sum of positive squares in 4 ways, for example, as 11799225 + 1841449 = 3435^2 + 1357^2 .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (13640677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34872 + ... + 35260.

Almost surely, 2^13640674 is an apocalyptic number.

13640674 is a deficient number, since it is larger than the sum of its proper divisors (7208726).

13640674 is a wasteful number, since it uses less digits than its factorization.

13640674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 13640674 is about 3693.3283092625. The cubic root of 13640674 is about 238.9343610412.

The spelling of 13640674 in words is "thirteen million, six hundred forty thousand, six hundred seventy-four".