52808340 has 96 divisors (see below), whose sum is σ = 161441280. Its totient is φ = 12819456.

The previous prime is 52808339. The next prime is 52808347. The reversal of 52808340 is 4380825.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 52808298 and 52808307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52808347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61192 + ... + 62048.

It is an arithmetic number, because the mean of its divisors is an integer number (1681680).

Almost surely, 2^52808340 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 52808340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80720640).

52808340 is an abundant number, since it is smaller than the sum of its proper divisors (108632940).

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

52808340 is a wasteful number, since it uses less digits than its factorization.

52808340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 52808340 is about 7266.9347045367. The cubic root of 52808340 is about 375.1752425385.

The spelling of 52808340 in words is "fifty-two million, eight hundred eight thousand, three hundred forty".