38947138 has 4 divisors (see below), whose sum is σ = 58420710. Its totient is φ = 19473568.

The previous prime is 38947123. The next prime is 38947151. The reversal of 38947138 is 83174983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83174983 = 5881 ⋅14143.

It can be written as a sum of positive squares in only one way, i.e., 22439169 + 16507969 = 4737^2 + 4063^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38947094 and 38947103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736783 + ... + 9736786.

Almost surely, 2^38947138 is an apocalyptic number.

38947138 is a deficient number, since it is larger than the sum of its proper divisors (19473572).

38947138 is a wasteful number, since it uses less digits than its factorization.

38947138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19473571.

The product of its digits is 145152, while the sum is 43.

The square root of 38947138 is about 6240.7642160235. The cubic root of 38947138 is about 338.9678560322.

The spelling of 38947138 in words is "thirty-eight million, nine hundred forty-seven thousand, one hundred thirty-eight".