52806420 has 72 divisors (see below), whose sum is σ = 169611624. Its totient is φ = 13252608.

The previous prime is 52806409. The next prime is 52806433. The reversal of 52806420 is 2460825.

It can be written as a sum of positive squares in 4 ways, for example, as 1483524 + 51322896 = 1218^2 + 7164^2 .

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5569 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (2355717).

Almost surely, 2^52806420 is an apocalyptic number.

It is an amenable number.

52806420 is an abundant number, since it is smaller than the sum of its proper divisors (116805204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52806420 is a wasteful number, since it uses less digits than its factorization.

52806420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17289 (or 17284 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 52806420 is about 7266.8025981170. The cubic root of 52806420 is about 375.1706956229.

Subtracting from 52806420 its reverse (2460825), we obtain a triangular number (50345595 = T₁₀₀₃₄).

The spelling of 52806420 in words is "fifty-two million, eight hundred six thousand, four hundred twenty".