38315939 has 4 divisors (see below), whose sum is σ = 38343000. Its totient is φ = 38288880.

The previous prime is 38315933. The next prime is 38315947. The reversal of 38315939 is 93951383.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38315939 is a prime.

It is a super-2 number, since 2×38315939² = 2936222362903442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38315896 and 38315905.

It is not an unprimeable number, because it can be changed into a prime (38315933) 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, 11282 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (9585750).

Almost surely, 2^38315939 is an apocalyptic number.

38315939 is a deficient number, since it is larger than the sum of its proper divisors (27061).

38315939 is a wasteful number, since it uses less digits than its factorization.

38315939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27060.

The product of its digits is 87480, while the sum is 41.

The square root of 38315939 is about 6189.9869951398. The cubic root of 38315939 is about 337.1267064277.

The spelling of 38315939 in words is "thirty-eight million, three hundred fifteen thousand, nine hundred thirty-nine".