52808940 has 72 divisors (see below), whose sum is σ = 160807920. Its totient is φ = 14027904.

The previous prime is 52808939. The next prime is 52808941. The reversal of 52808940 is 4980825.

It is an interprime number because it is at equal distance from previous prime (52808939) and next prime (52808941).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52808895 and 52808904.

It is not an unprimeable number, because it can be changed into a prime (52808941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71091 + ... + 71829.

Almost surely, 2^52808940 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 52808940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80403960).

52808940 is an abundant number, since it is smaller than the sum of its proper divisors (107998980).

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

52808940 is a wasteful number, since it uses less digits than its factorization.

52808940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 52808940 is about 7266.9759873004. The cubic root of 52808940 is about 375.1766634270.

The spelling of 52808940 in words is "fifty-two million, eight hundred eight thousand, nine hundred forty".