38655139 has 4 divisors (see below), whose sum is σ = 40689640. Its totient is φ = 36620640.

The previous prime is 38655137. The next prime is 38655191. The reversal of 38655139 is 93155683.

38655139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93155683 = 607 ⋅153469.

It is a cyclic number.

It is not a de Polignac number, because 38655139 - 2¹ = 38655137 is a prime.

It is a super-2 number, since 2×38655139² = 2988439542218642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38655131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1017222 + ... + 1017259.

It is an arithmetic number, because the mean of its divisors is an integer number (10172410).

Almost surely, 2^38655139 is an apocalyptic number.

38655139 is a deficient number, since it is larger than the sum of its proper divisors (2034501).

38655139 is a wasteful number, since it uses less digits than its factorization.

38655139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034500.

The product of its digits is 97200, while the sum is 40.

The square root of 38655139 is about 6217.3257112685. The cubic root of 38655139 is about 338.1186137628.

The spelling of 38655139 in words is "thirty-eight million, six hundred fifty-five thousand, one hundred thirty-nine".