38021381 has 8 divisors (see below), whose sum is σ = 38536344. Its totient is φ = 37509120.

The previous prime is 38021359. The next prime is 38021383. The reversal of 38021381 is 18312083.

It can be written as a sum of positive squares in 4 ways, for example, as 11498881 + 26522500 = 3391^2 + 5150^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 38021381 - 2²² = 33827077 is a prime.

It is a super-2 number, since 2×38021381² = 2891250826294322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38021381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38021383) 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, 57191 + ... + 57851.

It is an arithmetic number, because the mean of its divisors is an integer number (4817043).

Almost surely, 2^38021381 is an apocalyptic number.

It is an amenable number.

38021381 is a deficient number, since it is larger than the sum of its proper divisors (514963).

38021381 is an equidigital number, since it uses as much as digits as its factorization.

38021381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 38021381 is about 6166.1479871959. The cubic root of 38021381 is about 336.2605835910.

The spelling of 38021381 in words is "thirty-eight million, twenty-one thousand, three hundred eighty-one".