38138437 has 4 divisors (see below), whose sum is σ = 38177100. Its totient is φ = 38099776.

The previous prime is 38138413. The next prime is 38138449. The reversal of 38138437 is 73483183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15992001 + 22146436 = 3999^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 38138437 - 2²³ = 29749829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38138396 and 38138405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38138407) 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, 17812 + ... + 19837.

It is an arithmetic number, because the mean of its divisors is an integer number (9544275).

Almost surely, 2^38138437 is an apocalyptic number.

It is an amenable number.

38138437 is a deficient number, since it is larger than the sum of its proper divisors (38663).

38138437 is a wasteful number, since it uses less digits than its factorization.

38138437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662.

The product of its digits is 48384, while the sum is 37.

The square root of 38138437 is about 6175.6325182122. The cubic root of 38138437 is about 336.6053106282.

The spelling of 38138437 in words is "thirty-eight million, one hundred thirty-eight thousand, four hundred thirty-seven".