38199639 has 4 divisors (see below), whose sum is σ = 50932856. Its totient is φ = 25466424.

The previous prime is 38199613. The next prime is 38199647. The reversal of 38199639 is 93699183.

It is a happy number.

38199639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 38199639 - 2⁵ = 38199607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38199839) 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 3 ways as a sum of consecutive naturals, for example, 6366604 + ... + 6366609.

It is an arithmetic number, because the mean of its divisors is an integer number (12733214).

Almost surely, 2^38199639 is an apocalyptic number.

38199639 is a deficient number, since it is larger than the sum of its proper divisors (12733217).

38199639 is a wasteful number, since it uses less digits than its factorization.

38199639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12733216.

The product of its digits is 314928, while the sum is 48.

The square root of 38199639 is about 6180.5856518618. The cubic root of 38199639 is about 336.7852682597.

The spelling of 38199639 in words is "thirty-eight million, one hundred ninety-nine thousand, six hundred thirty-nine".