52665320 has 64 divisors (see below), whose sum is σ = 128595600. Its totient is φ = 19333120.

The previous prime is 52665313. The next prime is 52665329. The reversal of 52665320 is 2356625.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 15382084 + 37283236 = 3922^2 + 6106^2 .

It is not an unprimeable number, because it can be changed into a prime (52665329) 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, 26936 + ... + 28824.

Almost surely, 2^52665320 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 52665320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64297800).

52665320 is an abundant number, since it is smaller than the sum of its proper divisors (75930280).

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

52665320 is a wasteful number, since it uses less digits than its factorization.

52665320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 52665320 is about 7257.0875700931. The cubic root of 52665320 is about 374.8362425738.

The spelling of 52665320 in words is "fifty-two million, six hundred sixty-five thousand, three hundred twenty".