38821321 has 16 divisors (see below), whose sum is σ = 48706560. Its totient is φ = 30059280.

The previous prime is 38821297. The next prime is 38821333. The reversal of 38821321 is 12312883.

It is a cyclic number.

It is not a de Polignac number, because 38821321 - 2¹³ = 38813129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38821321.

It is not an unprimeable number, because it can be changed into a prime (38821361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11350 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^38821321 is an apocalyptic number.

It is an amenable number.

38821321 is a deficient number, since it is larger than the sum of its proper divisors (9885239).

38821321 is a wasteful number, since it uses less digits than its factorization.

38821321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204.

The product of its digits is 2304, while the sum is 28.

The square root of 38821321 is about 6230.6758060422. The cubic root of 38821321 is about 338.6024554097.

The spelling of 38821321 in words is "thirty-eight million, eight hundred twenty-one thousand, three hundred twenty-one".