38139641 has 4 divisors (see below), whose sum is σ = 39369984. Its totient is φ = 36909300.

The previous prime is 38139617. The next prime is 38139643. The reversal of 38139641 is 14693183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14693183 = 59 ⋅249037.

It is a cyclic number.

It is not a de Polignac number, because 38139641 - 2¹⁴ = 38123257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38139643) 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, 615125 + ... + 615186.

It is an arithmetic number, because the mean of its divisors is an integer number (9842496).

Almost surely, 2^38139641 is an apocalyptic number.

38139641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38139641 is a deficient number, since it is larger than the sum of its proper divisors (1230343).

38139641 is a wasteful number, since it uses less digits than its factorization.

38139641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230342.

The product of its digits is 15552, while the sum is 35.

The square root of 38139641 is about 6175.7299973363. The cubic root of 38139641 is about 336.6088527112.

The spelling of 38139641 in words is "thirty-eight million, one hundred thirty-nine thousand, six hundred forty-one".