38572381 has 4 divisors (see below), whose sum is σ = 38667100. Its totient is φ = 38477664.

The previous prime is 38572379. The next prime is 38572411. The reversal of 38572381 is 18327583.

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 34928100 + 3644281 = 5910^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 38572381 - 2¹ = 38572379 is a prime.

It is a super-2 number, since 2×38572381² = 2975657152018322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38572381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38572301) 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, 46746 + ... + 47563.

It is an arithmetic number, because the mean of its divisors is an integer number (9666775).

Almost surely, 2^38572381 is an apocalyptic number.

It is an amenable number.

38572381 is a deficient number, since it is larger than the sum of its proper divisors (94719).

38572381 is an equidigital number, since it uses as much as digits as its factorization.

38572381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94718.

The product of its digits is 40320, while the sum is 37.

The square root of 38572381 is about 6210.6667113926. Note that the first 3 decimals coincide. The cubic root of 38572381 is about 337.8771451082.

The spelling of 38572381 in words is "thirty-eight million, five hundred seventy-two thousand, three hundred eighty-one".