13457638 has 8 divisors (see below), whose sum is σ = 20206080. Its totient is φ = 6722280.

The previous prime is 13457629. The next prime is 13457713. The reversal of 13457638 is 83675431.

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

It is a super-2 number, since 2×13457638² = 362216041078088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13457597 and 13457606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73 + ... + 5188.

It is an arithmetic number, because the mean of its divisors is an integer number (2525760).

Almost surely, 2^13457638 is an apocalyptic number.

13457638 is a deficient number, since it is larger than the sum of its proper divisors (6748442).

13457638 is a wasteful number, since it uses less digits than its factorization.

13457638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542.

The product of its digits is 60480, while the sum is 37.

The square root of 13457638 is about 3668.4653467083. The cubic root of 13457638 is about 237.8608394865.

The spelling of 13457638 in words is "thirteen million, four hundred fifty-seven thousand, six hundred thirty-eight".