52809288 has 128 divisors (see below), whose sum is σ = 160358400. Its totient is φ = 14167296.

The previous prime is 52809277. The next prime is 52809313. The reversal of 52809288 is 88290825.

It is a Cunningham number, because it is equal to 7267²-1.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 305170 + ... + 305342.

It is an arithmetic number, because the mean of its divisors is an integer number (1252800).

Almost surely, 2^52809288 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 52809288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80179200).

52809288 is an abundant number, since it is smaller than the sum of its proper divisors (107549112).

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

52809288 is a wasteful number, since it uses less digits than its factorization.

52809288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 52809288 is about 7266.9999311958. Note that the first 4 decimals coincide. The cubic root of 52809288 is about 375.1774875374.

The spelling of 52809288 in words is "fifty-two million, eight hundred nine thousand, two hundred eighty-eight".