38920139 has 4 divisors (see below), whose sum is σ = 39200280. Its totient is φ = 38640000.

The previous prime is 38920129. The next prime is 38920171. The reversal of 38920139 is 93102983.

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 38920139 - 2⁸ = 38919883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38920099 and 38920108.

It is not an unprimeable number, because it can be changed into a prime (38920109) 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, 139862 + ... + 140139.

It is an arithmetic number, because the mean of its divisors is an integer number (9800070).

Almost surely, 2^38920139 is an apocalyptic number.

38920139 is a deficient number, since it is larger than the sum of its proper divisors (280141).

38920139 is a wasteful number, since it uses less digits than its factorization.

38920139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280140.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 38920139 is about 6238.6007245215. The cubic root of 38920139 is about 338.8895113051.

The spelling of 38920139 in words is "thirty-eight million, nine hundred twenty thousand, one hundred thirty-nine".