38492821 has 4 divisors (see below), whose sum is σ = 38520000. Its totient is φ = 38465644.

The previous prime is 38492819. The next prime is 38492833. The reversal of 38492821 is 12829483.

38492821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38492821 - 2¹ = 38492819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38492021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11341 + ... + 14338.

It is an arithmetic number, because the mean of its divisors is an integer number (9630000).

Almost surely, 2^38492821 is an apocalyptic number.

It is an amenable number.

38492821 is a deficient number, since it is larger than the sum of its proper divisors (27179).

38492821 is a wasteful number, since it uses less digits than its factorization.

38492821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27178.

The product of its digits is 27648, while the sum is 37.

The square root of 38492821 is about 6204.2582957192. The cubic root of 38492821 is about 337.6446816352.

It can be divided in two parts, 3849 and 2821, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 38492821 in words is "thirty-eight million, four hundred ninety-two thousand, eight hundred twenty-one".