52638940 has 12 divisors (see below), whose sum is σ = 110541816. Its totient is φ = 21055568.

The previous prime is 52638917. The next prime is 52638941. The reversal of 52638940 is 4983625.

52638940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 52638940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52638941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315954 + ... + 1315993.

It is an arithmetic number, because the mean of its divisors is an integer number (9211818).

Almost surely, 2^52638940 is an apocalyptic number.

It is an amenable number.

52638940 is an abundant number, since it is smaller than the sum of its proper divisors (57902876).

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

52638940 is a wasteful number, since it uses less digits than its factorization.

52638940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631956 (or 2631954 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 52638940 is about 7255.2698089044. The cubic root of 52638940 is about 374.7736471028.

The spelling of 52638940 in words is "fifty-two million, six hundred thirty-eight thousand, nine hundred forty".