13642438 has 8 divisors (see below), whose sum is σ = 20939688. Its totient is φ = 6662544.

The previous prime is 13642429. The next prime is 13642439. The reversal of 13642438 is 83424631.

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

It is a super-2 number, since 2×13642438² = 372232229167688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642439) 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, 79231 + ... + 79402.

It is an arithmetic number, because the mean of its divisors is an integer number (2617461).

Almost surely, 2^13642438 is an apocalyptic number.

13642438 is a deficient number, since it is larger than the sum of its proper divisors (7297250).

13642438 is a wasteful number, since it uses less digits than its factorization.

13642438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158678.

The product of its digits is 13824, while the sum is 31.

The square root of 13642438 is about 3693.5671105315. The cubic root of 13642438 is about 238.9446601913.

The spelling of 13642438 in words is "thirteen million, six hundred forty-two thousand, four hundred thirty-eight".