38378161 has 4 divisors (see below), whose sum is σ = 38573172. Its totient is φ = 38183152.

The previous prime is 38378159. The next prime is 38378189. The reversal of 38378161 is 16187383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16187383 = 17 ⋅952199.

It can be written as a sum of positive squares in 2 ways, for example, as 36675136 + 1703025 = 6056^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 38378161 - 2¹ = 38378159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38378161.

It is not an unprimeable number, because it can be changed into a prime (38378101) 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, 97210 + ... + 97603.

It is an arithmetic number, because the mean of its divisors is an integer number (9643293).

Almost surely, 2^38378161 is an apocalyptic number.

It is an amenable number.

38378161 is a deficient number, since it is larger than the sum of its proper divisors (195011).

38378161 is a wasteful number, since it uses less digits than its factorization.

38378161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195010.

The product of its digits is 24192, while the sum is 37.

The square root of 38378161 is about 6195.0109765843. The cubic root of 38378161 is about 337.3090966103.

The spelling of 38378161 in words is "thirty-eight million, three hundred seventy-eight thousand, one hundred sixty-one".