38303821 has 4 divisors (see below), whose sum is σ = 38317500. Its totient is φ = 38290144.

The previous prime is 38303819. The next prime is 38303827. The reversal of 38303821 is 12830383.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 32832900 = 2339^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 38303821 - 2¹ = 38303819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38303821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38303827) 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, 946 + ... + 8803.

It is an arithmetic number, because the mean of its divisors is an integer number (9579375).

Almost surely, 2^38303821 is an apocalyptic number.

It is an amenable number.

38303821 is a deficient number, since it is larger than the sum of its proper divisors (13679).

38303821 is an equidigital number, since it uses as much as digits as its factorization.

38303821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13678.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 38303821 is about 6189.0080788443. The cubic root of 38303821 is about 337.0911621930.

It can be divided in two parts, 3830382 and 1, that added together give a palindrome (3830383).

The spelling of 38303821 in words is "thirty-eight million, three hundred three thousand, eight hundred twenty-one".