38129638 has 8 divisors (see below), whose sum is σ = 57249360. Its totient is φ = 19046520.

The previous prime is 38129629. The next prime is 38129669. The reversal of 38129638 is 83692183.

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

It is a super-2 number, since 2×38129638² = 2907738588022088, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 38129638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6378 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (7156170).

Almost surely, 2^38129638 is an apocalyptic number.

38129638 is a deficient number, since it is larger than the sum of its proper divisors (19119722).

38129638 is a wasteful number, since it uses less digits than its factorization.

38129638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18302.

The product of its digits is 62208, while the sum is 40.

The square root of 38129638 is about 6174.9200804545. The cubic root of 38129638 is about 336.5794223279.

The spelling of 38129638 in words is "thirty-eight million, one hundred twenty-nine thousand, six hundred thirty-eight".