52390320 has 80 divisors (see below), whose sum is σ = 169489152. Its totient is φ = 13361920.

The previous prime is 52390309. The next prime is 52390321. The reversal of 52390320 is 2309325.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (52390321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775 + ... + 10265.

Almost surely, 2^52390320 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 52390320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84744576).

52390320 is an abundant number, since it is smaller than the sum of its proper divisors (117098832).

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

52390320 is a wasteful number, since it uses less digits than its factorization.

52390320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530 (or 9524 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 52390320 is about 7238.1157769132. The cubic root of 52390320 is about 374.1826821605.

Adding to 52390320 its reverse (2309325), we get a palindrome (54699645).

The spelling of 52390320 in words is "fifty-two million, three hundred ninety thousand, three hundred twenty".