38491221 has 8 divisors (see below), whose sum is σ = 52024960. Its totient is φ = 25309152.

The previous prime is 38491199. The next prime is 38491223. The reversal of 38491221 is 12219483.

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

It is not a de Polignac number, because 38491221 - 2¹⁰ = 38490197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38491223) 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, 87661 + ... + 88098.

It is an arithmetic number, because the mean of its divisors is an integer number (6503120).

Almost surely, 2^38491221 is an apocalyptic number.

It is an amenable number.

38491221 is a deficient number, since it is larger than the sum of its proper divisors (13533739).

38491221 is a wasteful number, since it uses less digits than its factorization.

38491221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175835.

The product of its digits is 3456, while the sum is 30.

The square root of 38491221 is about 6204.1293506825. The cubic root of 38491221 is about 337.6400033691.

The spelling of 38491221 in words is "thirty-eight million, four hundred ninety-one thousand, two hundred twenty-one".