13638970 has 8 divisors (see below), whose sum is σ = 24550164. Its totient is φ = 5455584.

The previous prime is 13638943. The next prime is 13638991. The reversal of 13638970 is 7983631.

It can be written as a sum of positive squares in 2 ways, for example, as 12823561 + 815409 = 3581^2 + 903^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681939 + ... + 681958.

Almost surely, 2^13638970 is an apocalyptic number.

13638970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13638970 is a deficient number, since it is larger than the sum of its proper divisors (10911194).

13638970 is a wasteful number, since it uses less digits than its factorization.

13638970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363904.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13638970 is about 3693.0976158233. The cubic root of 13638970 is about 238.9244113592.

The spelling of 13638970 in words is "thirteen million, six hundred thirty-eight thousand, nine hundred seventy".