38146821 has 4 divisors (see below), whose sum is σ = 50862432. Its totient is φ = 25431212.

The previous prime is 38146817. The next prime is 38146837. The reversal of 38146821 is 12864183.

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 38146821 - 2² = 38146817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38146841) 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, 6357801 + ... + 6357806.

It is an arithmetic number, because the mean of its divisors is an integer number (12715608).

Almost surely, 2^38146821 is an apocalyptic number.

It is an amenable number.

38146821 is a deficient number, since it is larger than the sum of its proper divisors (12715611).

38146821 is a wasteful number, since it uses less digits than its factorization.

38146821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12715610.

The product of its digits is 9216, while the sum is 33.

The square root of 38146821 is about 6176.3112777774. The cubic root of 38146821 is about 336.6299742168.

The spelling of 38146821 in words is "thirty-eight million, one hundred forty-six thousand, eight hundred twenty-one".