52640052 has 12 divisors (see below), whose sum is σ = 122826816. Its totient is φ = 17546680.

The previous prime is 52639999. The next prime is 52640053. The reversal of 52640052 is 25004625.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52640053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193324 + ... + 2193347.

It is an arithmetic number, because the mean of its divisors is an integer number (10235568).

Almost surely, 2^52640052 is an apocalyptic number.

It is an amenable number.

52640052 is an abundant number, since it is smaller than the sum of its proper divisors (70186764).

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

52640052 is a wasteful number, since it uses less digits than its factorization.

52640052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386678 (or 4386676 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 52640052 is about 7255.3464424519. The cubic root of 52640052 is about 374.7762861210.

Adding to 52640052 its reverse (25004625), we get a palindrome (77644677).

The spelling of 52640052 in words is "fifty-two million, six hundred forty thousand, fifty-two".