37638138 has 8 divisors (see below), whose sum is σ = 75276288. Its totient is φ = 12546044.

The previous prime is 37638131. The next prime is 37638149. The reversal of 37638138 is 83183673.

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

37638138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 37638096 and 37638105.

It is not an unprimeable number, because it can be changed into a prime (37638131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3136506 + ... + 3136517.

It is an arithmetic number, because the mean of its divisors is an integer number (9409536).

Almost surely, 2^37638138 is an apocalyptic number.

37638138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

37638138 is a wasteful number, since it uses less digits than its factorization.

37638138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273028.

The product of its digits is 72576, while the sum is 39.

The square root of 37638138 is about 6134.9929095314. The cubic root of 37638138 is about 335.1269675402.

The spelling of 37638138 in words is "thirty-seven million, six hundred thirty-eight thousand, one hundred thirty-eight".