38856391 has 16 divisors (see below), whose sum is σ = 45771264. Its totient is φ = 32294304.

The previous prime is 38856371. The next prime is 38856403. The reversal of 38856391 is 19365883.

38856391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38856391 - 2⁵ = 38856359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38856331) 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 15 ways as a sum of consecutive naturals, for example, 49881 + ... + 50653.

It is an arithmetic number, because the mean of its divisors is an integer number (2860704).

Almost surely, 2^38856391 is an apocalyptic number.

38856391 is a deficient number, since it is larger than the sum of its proper divisors (6914873).

38856391 is a wasteful number, since it uses less digits than its factorization.

38856391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its digits is 155520, while the sum is 43.

The square root of 38856391 is about 6233.4894721977. The cubic root of 38856391 is about 338.7043857736.

The spelling of 38856391 in words is "thirty-eight million, eight hundred fifty-six thousand, three hundred ninety-one".