38267821 has 4 divisors (see below), whose sum is σ = 38353500. Its totient is φ = 38182144.

The previous prime is 38267797. The next prime is 38267839. The reversal of 38267821 is 12876283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12876283 = 7 ⋅1839469.

It can be written as a sum of positive squares in 2 ways, for example, as 23174596 + 15093225 = 4814^2 + 3885^2 .

It is a cyclic number.

It is not a de Polignac number, because 38267821 - 2¹⁹ = 37743533 is a prime.

It is a super-2 number, since 2×38267821² = 2928852248176082, 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 (38267891) 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, 42166 + ... + 43063.

It is an arithmetic number, because the mean of its divisors is an integer number (9588375).

Almost surely, 2^38267821 is an apocalyptic number.

It is an amenable number.

38267821 is a deficient number, since it is larger than the sum of its proper divisors (85679).

38267821 is an equidigital number, since it uses as much as digits as its factorization.

38267821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85678.

The product of its digits is 32256, while the sum is 37.

The square root of 38267821 is about 6186.0990131100. The cubic root of 38267821 is about 336.9855235969.

The spelling of 38267821 in words is "thirty-eight million, two hundred sixty-seven thousand, eight hundred twenty-one".