38249281 has 4 divisors (see below), whose sum is σ = 43713472. Its totient is φ = 32785092.

The previous prime is 38249279. The next prime is 38249293. The reversal of 38249281 is 18294283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38249281 - 2¹ = 38249279 is a prime.

It is a super-2 number, since 2×38249281² = 2926014994033922, 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 38249281.

It is not an unprimeable number, because it can be changed into a prime (38249221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732085 + ... + 2732098.

It is an arithmetic number, because the mean of its divisors is an integer number (10928368).

Almost surely, 2^38249281 is an apocalyptic number.

It is an amenable number.

38249281 is a deficient number, since it is larger than the sum of its proper divisors (5464191).

38249281 is an equidigital number, since it uses as much as digits as its factorization.

38249281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464190.

The product of its digits is 27648, while the sum is 37.

The square root of 38249281 is about 6184.6003104485. The cubic root of 38249281 is about 336.9310938726.

The spelling of 38249281 in words is "thirty-eight million, two hundred forty-nine thousand, two hundred eighty-one".