52640056 has 16 divisors (see below), whose sum is σ = 112800240. Its totient is φ = 22560000.

The previous prime is 52640053. The next prime is 52640083. The reversal of 52640056 is 65004625.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 469945 + ... + 470056.

It is an arithmetic number, because the mean of its divisors is an integer number (7050015).

Almost surely, 2^52640056 is an apocalyptic number.

52640056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

52640056 is an abundant number, since it is smaller than the sum of its proper divisors (60160184).

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

52640056 is a wasteful number, since it uses less digits than its factorization.

52640056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940014 (or 940010 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 52640056 is about 7255.3467181107. The cubic root of 52640056 is about 374.7762956138.

The spelling of 52640056 in words is "fifty-two million, six hundred forty thousand, fifty-six".