13640516 has 12 divisors (see below), whose sum is σ = 24005520. Its totient is φ = 6781800.

The previous prime is 13640513. The next prime is 13640521. The reversal of 13640516 is 61504631.

It is not an unprimeable number, because it can be changed into a prime (13640513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8810 + ... + 10241.

It is an arithmetic number, because the mean of its divisors is an integer number (2000460).

Almost surely, 2^13640516 is an apocalyptic number.

It is an amenable number.

13640516 is a deficient number, since it is larger than the sum of its proper divisors (10365004).

13640516 is a wasteful number, since it uses less digits than its factorization.

13640516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19234 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13640516 is about 3693.3069192798. The cubic root of 13640516 is about 238.9334385117.

The spelling of 13640516 in words is "thirteen million, six hundred forty thousand, five hundred sixteen".