38418381 has 20 divisors (see below), whose sum is σ = 58370400. Its totient is φ = 25175016.

The previous prime is 38418379. The next prime is 38418397. The reversal of 38418381 is 18381483.

It is not a de Polignac number, because 38418381 - 2¹ = 38418379 is a prime.

It is a super-2 number, since 2×38418381² = 2951943997322322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38414381) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 760 + ... + 8798.

It is an arithmetic number, because the mean of its divisors is an integer number (2918520).

Almost surely, 2^38418381 is an apocalyptic number.

It is an amenable number.

38418381 is a deficient number, since it is larger than the sum of its proper divisors (19952019).

38418381 is an equidigital number, since it uses as much as digits as its factorization.

38418381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8110 (or 8101 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 38418381 is about 6198.2562870536. The cubic root of 38418381 is about 337.4268878667.

The spelling of 38418381 in words is "thirty-eight million, four hundred eighteen thousand, three hundred eighty-one".