38116381 has 4 divisors (see below), whose sum is σ = 38835612. Its totient is φ = 37397152.

The previous prime is 38116373. The next prime is 38116417. The reversal of 38116381 is 18361183.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18844281 + 19272100 = 4341^2 + 4390^2 .

It is a cyclic number.

It is not a de Polignac number, because 38116381 - 2³ = 38116373 is a prime.

It is a super-2 number, since 2×38116381² = 2905717001074322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38116321) 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, 359536 + ... + 359641.

It is an arithmetic number, because the mean of its divisors is an integer number (9708903).

Almost surely, 2^38116381 is an apocalyptic number.

It is an amenable number.

38116381 is a deficient number, since it is larger than the sum of its proper divisors (719231).

38116381 is an equidigital number, since it uses as much as digits as its factorization.

38116381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719230.

The product of its digits is 3456, while the sum is 31.

The square root of 38116381 is about 6173.8465319442. The cubic root of 38116381 is about 336.5404102378.

The spelling of 38116381 in words is "thirty-eight million, one hundred sixteen thousand, three hundred eighty-one".