38781853 has 4 divisors (see below), whose sum is σ = 42307488. Its totient is φ = 35256220.

The previous prime is 38781851. The next prime is 38781857. The reversal of 38781853 is 35818783.

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.

It is a cyclic number.

It is not a de Polignac number, because 38781853 - 2¹ = 38781851 is a prime.

It is a super-2 number, since 2×38781853² = 3008064244227218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38781851) 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, 1762801 + ... + 1762822.

It is an arithmetic number, because the mean of its divisors is an integer number (10576872).

Almost surely, 2^38781853 is an apocalyptic number.

It is an amenable number.

38781853 is a deficient number, since it is larger than the sum of its proper divisors (3525635).

38781853 is a wasteful number, since it uses less digits than its factorization.

38781853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525634.

The product of its digits is 161280, while the sum is 43.

The square root of 38781853 is about 6227.5077679598. The cubic root of 38781853 is about 338.4876688888.

The spelling of 38781853 in words is "thirty-eight million, seven hundred eighty-one thousand, eight hundred fifty-three".