52420520 has 64 divisors (see below), whose sum is σ = 126074880. Its totient is φ = 19547136.

The previous prime is 52420493. The next prime is 52420541. The reversal of 52420520 is 2502425.

52420520 = 1748² + 1749² + ... + 1764².

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 52420492 and 52420501.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 86057 + ... + 86663.

It is an arithmetic number, because the mean of its divisors is an integer number (1969920).

Almost surely, 2^52420520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52420520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63037440).

52420520 is an abundant number, since it is smaller than the sum of its proper divisors (73654360).

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

52420520 is a wasteful number, since it uses less digits than its factorization.

52420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 52420520 is about 7240.2016546502. The cubic root of 52420520 is about 374.2545666000.

Adding to 52420520 its reverse (2502425), we get a palindrome (54922945).

The spelling of 52420520 in words is "fifty-two million, four hundred twenty thousand, five hundred twenty".