38611861 has 4 divisors (see below), whose sum is σ = 38751532. Its totient is φ = 38472192.

The previous prime is 38611829. The next prime is 38611883. The reversal of 38611861 is 16811683.

38611861 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: 16811683 = 7 ⋅2401669.

It can be written as a sum of positive squares in 2 ways, for example, as 21022225 + 17589636 = 4585^2 + 4194^2 .

It is a cyclic number.

It is not a de Polignac number, because 38611861 - 2⁵ = 38611829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38611891) 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, 69420 + ... + 69973.

It is an arithmetic number, because the mean of its divisors is an integer number (9687883).

Almost surely, 2^38611861 is an apocalyptic number.

It is an amenable number.

38611861 is a deficient number, since it is larger than the sum of its proper divisors (139671).

38611861 is a wasteful number, since it uses less digits than its factorization.

38611861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139670.

The product of its digits is 6912, while the sum is 34.

The square root of 38611861 is about 6213.8443012357. The cubic root of 38611861 is about 337.9923816310.

The spelling of 38611861 in words is "thirty-eight million, six hundred eleven thousand, eight hundred sixty-one".