38739639 has 8 divisors (see below), whose sum is σ = 52154752. Its totient is φ = 25575480.

The previous prime is 38739607. The next prime is 38739641. The reversal of 38739639 is 93693783.

It is a happy number.

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

It is not a de Polignac number, because 38739639 - 2⁵ = 38739607 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 (38739839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62377 + ... + 62994.

It is an arithmetic number, because the mean of its divisors is an integer number (6519344).

Almost surely, 2^38739639 is an apocalyptic number.

38739639 is a deficient number, since it is larger than the sum of its proper divisors (13415113).

38739639 is a wasteful number, since it uses less digits than its factorization.

38739639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125477.

The product of its digits is 734832, while the sum is 48.

The square root of 38739639 is about 6224.1175278107. The cubic root of 38739639 is about 338.3648098282.

The spelling of 38739639 in words is "thirty-eight million, seven hundred thirty-nine thousand, six hundred thirty-nine".