13642738 has 16 divisors (see below), whose sum is σ = 21821400. Its totient is φ = 6374656.

The previous prime is 13642723. The next prime is 13642753. The reversal of 13642738 is 83724631.

It is a happy number.

13642738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13642723) and next prime (13642753).

It can be written as a sum of positive squares in 4 ways, for example, as 10413529 + 3229209 = 3227^2 + 1797^2 .

It is a super-2 number, since 2×13642738² = 372248600273288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3720 + ... + 6412.

Almost surely, 2^13642738 is an apocalyptic number.

13642738 is a deficient number, since it is larger than the sum of its proper divisors (8178662).

13642738 is a wasteful number, since it uses less digits than its factorization.

13642738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861.

The product of its digits is 24192, while the sum is 34.

The square root of 13642738 is about 3693.6077214561. The cubic root of 13642738 is about 238.9464116591.

The spelling of 13642738 in words is "thirteen million, six hundred forty-two thousand, seven hundred thirty-eight".