52820340 has 96 divisors (see below), whose sum is σ = 154344960. Its totient is φ = 13485696.

The previous prime is 52820333. The next prime is 52820347. The reversal of 52820340 is 4302825.

52820340 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52820333) and next prime (52820347).

52820340 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 52820340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52820347) 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, 152047 + ... + 152393.

It is an arithmetic number, because the mean of its divisors is an integer number (1607760).

Almost surely, 2^52820340 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 52820340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77172480).

52820340 is an abundant number, since it is smaller than the sum of its proper divisors (101524620).

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

52820340 is a wasteful number, since it uses less digits than its factorization.

52820340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 52820340 is about 7267.7603152553. The cubic root of 52820340 is about 375.2036582644.

The spelling of 52820340 in words is "fifty-two million, eight hundred twenty thousand, three hundred forty".