52390520 has 128 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 16091136.

The previous prime is 52390519. The next prime is 52390537. The reversal of 52390520 is 2509325.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 52390520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134486 + ... + 134874.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^52390520 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 52390520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74692800).

52390520 is an abundant number, since it is smaller than the sum of its proper divisors (96995080).

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

52390520 is a wasteful number, since it uses less digits than its factorization.

52390520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 52390520 is about 7238.1295926503. The cubic root of 52390520 is about 374.1831583073.

Adding to 52390520 its reverse (2509325), we get a palindrome (54899845).

The spelling of 52390520 in words is "fifty-two million, three hundred ninety thousand, five hundred twenty".