38221669 has 4 divisors (see below), whose sum is σ = 39034944. Its totient is φ = 37408396.

The previous prime is 38221663. The next prime is 38221679. The reversal of 38221669 is 96612283.

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 38221669 - 2⁵ = 38221637 is a prime.

It is a super-2 number, since 2×38221669² = 2921791962291122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38221663) 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, 406567 + ... + 406660.

It is an arithmetic number, because the mean of its divisors is an integer number (9758736).

Almost surely, 2^38221669 is an apocalyptic number.

It is an amenable number.

38221669 is a deficient number, since it is larger than the sum of its proper divisors (813275).

38221669 is an equidigital number, since it uses as much as digits as its factorization.

38221669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813274.

The product of its digits is 31104, while the sum is 37.

The square root of 38221669 is about 6182.3675885538. The cubic root of 38221669 is about 336.8499979609.

The spelling of 38221669 in words is "thirty-eight million, two hundred twenty-one thousand, six hundred sixty-nine".