13640492 has 12 divisors (see below), whose sum is σ = 24018456. Its totient is φ = 6778080.

The previous prime is 13640491. The next prime is 13640509. The reversal of 13640492 is 29404631.

It is not an unprimeable number, because it can be changed into a prime (13640491) 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, 9809 + ... + 11112.

It is an arithmetic number, because the mean of its divisors is an integer number (2001538).

Almost surely, 2^13640492 is an apocalyptic number.

It is an amenable number.

13640492 is a deficient number, since it is larger than the sum of its proper divisors (10377964).

13640492 is a wasteful number, since it uses less digits than its factorization.

13640492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21088 (or 21086 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 13640492 is about 3693.3036701577. The cubic root of 13640492 is about 238.9332983800.

The spelling of 13640492 in words is "thirteen million, six hundred forty thousand, four hundred ninety-two".