38856431 has 4 divisors (see below), whose sum is σ = 38869032. Its totient is φ = 38843832.

The previous prime is 38856427. The next prime is 38856439. The reversal of 38856431 is 13465883.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13465883 = 131 ⋅102793.

It is a cyclic number.

It is not a de Polignac number, because 38856431 - 2² = 38856427 is a prime.

It is a super-2 number, since 2×38856431² = 3019644460115522, 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 (38856439) 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, 1781 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (9717258).

Almost surely, 2^38856431 is an apocalyptic number.

38856431 is a deficient number, since it is larger than the sum of its proper divisors (12601).

38856431 is an equidigital number, since it uses as much as digits as its factorization.

38856431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12600.

The product of its digits is 69120, while the sum is 38.

The square root of 38856431 is about 6233.4926806727. The cubic root of 38856431 is about 338.7045019979.

The spelling of 38856431 in words is "thirty-eight million, eight hundred fifty-six thousand, four hundred thirty-one".