38947811 has 8 divisors (see below), whose sum is σ = 45947904. Its totient is φ = 32306760.

The previous prime is 38947807. The next prime is 38947817. The reversal of 38947811 is 11874983.

38947811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38947811 - 2² = 38947807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38947817) 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 7 ways as a sum of consecutive naturals, for example, 89525 + ... + 89958.

It is an arithmetic number, because the mean of its divisors is an integer number (5743488).

Almost surely, 2^38947811 is an apocalyptic number.

38947811 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38947811 is a deficient number, since it is larger than the sum of its proper divisors (7000093).

38947811 is a wasteful number, since it uses less digits than its factorization.

38947811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179521.

The product of its digits is 48384, while the sum is 41.

The square root of 38947811 is about 6240.8181354691. The cubic root of 38947811 is about 338.9698084568.

The spelling of 38947811 in words is "thirty-eight million, nine hundred forty-seven thousand, eight hundred eleven".