52821838 has 4 divisors (see below), whose sum is σ = 79232760. Its totient is φ = 26410918.

The previous prime is 52821833. The next prime is 52821859. The reversal of 52821838 is 83812825.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 52821797 and 52821806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52821833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13205458 + ... + 13205461.

It is an arithmetic number, because the mean of its divisors is an integer number (19808190).

Almost surely, 2^52821838 is an apocalyptic number.

52821838 is a deficient number, since it is larger than the sum of its proper divisors (26410922).

52821838 is a wasteful number, since it uses less digits than its factorization.

52821838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26410921.

The product of its digits is 30720, while the sum is 37.

The square root of 52821838 is about 7267.8633724087. The cubic root of 52821838 is about 375.2072051920.

It can be divided in two parts, 528 and 21838, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 52821838 in words is "fifty-two million, eight hundred twenty-one thousand, eight hundred thirty-eight".