13640029 has 8 divisors (see below), whose sum is σ = 14743512. Its totient is φ = 12544320.

The previous prime is 13640017. The next prime is 13640041. The reversal of 13640029 is 92004631.

It is an interprime number because it is at equal distance from previous prime (13640017) and next prime (13640041).

It can be written as a sum of positive squares in 4 ways, for example, as 5631129 + 8008900 = 2373^2 + 2830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13640029 - 2¹⁵ = 13607261 is a prime.

It is a super-2 number, since 2×13640029² = 372100782241682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13639985 and 13640012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640009) 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, 2019 + ... + 5599.

It is an arithmetic number, because the mean of its divisors is an integer number (1842939).

Almost surely, 2^13640029 is an apocalyptic number.

It is an amenable number.

13640029 is a deficient number, since it is larger than the sum of its proper divisors (1103483).

13640029 is a wasteful number, since it uses less digits than its factorization.

13640029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13640029 is about 3693.2409886169. The cubic root of 13640029 is about 238.9305949739.

The spelling of 13640029 in words is "thirteen million, six hundred forty thousand, twenty-nine".