38638081 has 4 divisors (see below), whose sum is σ = 39013312. Its totient is φ = 38262852.

The previous prime is 38638079. The next prime is 38638087. The reversal of 38638081 is 18083683.

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: 18083683 = 149 ⋅121367.

It is not a de Polignac number, because 38638081 - 2¹ = 38638079 is a prime.

It is a super-2 number, since 2×38638081² = 2985802606725122, which contains 22 as substring.

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 38638081.

It is not an unprimeable number, because it can be changed into a prime (38638087) 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, 187461 + ... + 187666.

It is an arithmetic number, because the mean of its divisors is an integer number (9753328).

Almost surely, 2^38638081 is an apocalyptic number.

It is an amenable number.

38638081 is a deficient number, since it is larger than the sum of its proper divisors (375231).

38638081 is a wasteful number, since it uses less digits than its factorization.

38638081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375230.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 38638081 is about 6215.9537482192. The cubic root of 38638081 is about 338.0688706923.

The spelling of 38638081 in words is "thirty-eight million, six hundred thirty-eight thousand, eighty-one".