38130881 has 4 divisors (see below), whose sum is σ = 40373892. Its totient is φ = 35887872.

The previous prime is 38130821. The next prime is 38130887. The reversal of 38130881 is 18803183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29604481 + 8526400 = 5441^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 38130881 - 2¹⁰ = 38129857 is a prime.

It is a super-2 number, since 2×38130881² = 2907928171672322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38130887) 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, 1121480 + ... + 1121513.

It is an arithmetic number, because the mean of its divisors is an integer number (10093473).

Almost surely, 2^38130881 is an apocalyptic number.

It is an amenable number.

38130881 is a deficient number, since it is larger than the sum of its proper divisors (2243011).

38130881 is a wasteful number, since it uses less digits than its factorization.

38130881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243010.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 38130881 is about 6175.0207287101. The cubic root of 38130881 is about 336.5830797075.

The spelling of 38130881 in words is "thirty-eight million, one hundred thirty thousand, eight hundred eighty-one".