38642321 has 4 divisors (see below), whose sum is σ = 38674944. Its totient is φ = 38609700.

The previous prime is 38642311. The next prime is 38642339. The reversal of 38642321 is 12324683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12324683 = 7 ⋅1760669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38642321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38642311) 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, 14465 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (9668736).

Almost surely, 2^38642321 is an apocalyptic number.

It is an amenable number.

38642321 is a deficient number, since it is larger than the sum of its proper divisors (32623).

38642321 is a wasteful number, since it uses less digits than its factorization.

38642321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32622.

The product of its digits is 6912, while the sum is 29.

The square root of 38642321 is about 6216.2947967419. The cubic root of 38642321 is about 338.0812363821.

The spelling of 38642321 in words is "thirty-eight million, six hundred forty-two thousand, three hundred twenty-one".