38284821 has 6 divisors (see below), whose sum is σ = 55300310. Its totient is φ = 25523208.

The previous prime is 38284819. The next prime is 38284847. The reversal of 38284821 is 12848283.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38266596 + 18225 = 6186^2 + 135^2 .

It is not a de Polignac number, because 38284821 - 2¹ = 38284819 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38284861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2126926 + ... + 2126943.

Almost surely, 2^38284821 is an apocalyptic number.

It is an amenable number.

38284821 is a deficient number, since it is larger than the sum of its proper divisors (17015489).

38284821 is a wasteful number, since it uses less digits than its factorization.

38284821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253875 (or 4253872 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 38284821 is about 6187.4729090316. The cubic root of 38284821 is about 337.0354167417.

It can be divided in two parts, 3828 and 4821, that added together give a square (8649 = 93²).

The spelling of 38284821 in words is "thirty-eight million, two hundred eighty-four thousand, eight hundred twenty-one".