38463681 has 4 divisors (see below), whose sum is σ = 51284912. Its totient is φ = 25642452.

The previous prime is 38463679. The next prime is 38463697. The reversal of 38463681 is 18636483.

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: 18636483 = 3 ⋅6212161.

It is not a de Polignac number, because 38463681 - 2¹ = 38463679 is a prime.

It is a super-2 number, since 2×38463681² = 2958909512139522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38463671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6410611 + ... + 6410616.

It is an arithmetic number, because the mean of its divisors is an integer number (12821228).

Almost surely, 2^38463681 is an apocalyptic number.

It is an amenable number.

38463681 is a deficient number, since it is larger than the sum of its proper divisors (12821231).

38463681 is a wasteful number, since it uses less digits than its factorization.

38463681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12821230.

The product of its digits is 82944, while the sum is 39.

The square root of 38463681 is about 6201.9094640280. The cubic root of 38463681 is about 337.5594583859.

The spelling of 38463681 in words is "thirty-eight million, four hundred sixty-three thousand, six hundred eighty-one".