38638311 has 4 divisors (see below), whose sum is σ = 51517752. Its totient is φ = 25758872.

The previous prime is 38638309. The next prime is 38638337. The reversal of 38638311 is 11383683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38638311 - 2¹ = 38638309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38638361) 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, 6439716 + ... + 6439721.

It is an arithmetic number, because the mean of its divisors is an integer number (12879438).

Almost surely, 2^38638311 is an apocalyptic number.

38638311 is a deficient number, since it is larger than the sum of its proper divisors (12879441).

38638311 is a wasteful number, since it uses less digits than its factorization.

38638311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12879440.

The product of its digits is 10368, while the sum is 33.

The square root of 38638311 is about 6215.9722489728. The cubic root of 38638311 is about 338.0695414958.

The spelling of 38638311 in words is "thirty-eight million, six hundred thirty-eight thousand, three hundred eleven".