38871649 has 4 divisors (see below), whose sum is σ = 39819780. Its totient is φ = 37923520.

The previous prime is 38871643. The next prime is 38871653. The reversal of 38871649 is 94617883.

It is a happy number.

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 518400 + 38353249 = 720^2 + 6193^2 .

It is a cyclic number.

It is not a de Polignac number, because 38871649 - 2¹¹ = 38869601 is a prime.

It is a super-2 number, since 2×38871649² = 3022010191958402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38871599 and 38871608.

It is not an unprimeable number, because it can be changed into a prime (38871643) 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, 474004 + ... + 474085.

It is an arithmetic number, because the mean of its divisors is an integer number (9954945).

Almost surely, 2^38871649 is an apocalyptic number.

It is an amenable number.

38871649 is a deficient number, since it is larger than the sum of its proper divisors (948131).

38871649 is an equidigital number, since it uses as much as digits as its factorization.

38871649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948130.

The product of its digits is 290304, while the sum is 46.

The square root of 38871649 is about 6234.7132251612. The cubic root of 38871649 is about 338.7487137472.

The spelling of 38871649 in words is "thirty-eight million, eight hundred seventy-one thousand, six hundred forty-nine".