38138711 has 16 divisors (see below), whose sum is σ = 42862848. Its totient is φ = 33696000.

The previous prime is 38138707. The next prime is 38138717. The reversal of 38138711 is 11783183.

It is not a de Polignac number, because 38138711 - 2² = 38138707 is a prime.

It is a super-2 number, since 2×38138711² = 2909122553483042, 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 (38138717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40235 + ... + 41171.

It is an arithmetic number, because the mean of its divisors is an integer number (2678928).

Almost surely, 2^38138711 is an apocalyptic number.

38138711 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38138711 is a deficient number, since it is larger than the sum of its proper divisors (4724137).

38138711 is a wasteful number, since it uses less digits than its factorization.

38138711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082.

The product of its digits is 4032, while the sum is 32.

The square root of 38138711 is about 6175.6547021348. The cubic root of 38138711 is about 336.6061167234.

The spelling of 38138711 in words is "thirty-eight million, one hundred thirty-eight thousand, seven hundred eleven".