52726640 has 40 divisors (see below), whose sum is σ = 126822240. Its totient is φ = 20362496.

The previous prime is 52726637. The next prime is 52726693. The reversal of 52726640 is 4662725.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 52726597 and 52726606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9044 + ... + 13683.

It is an arithmetic number, because the mean of its divisors is an integer number (3170556).

Almost surely, 2^52726640 is an apocalyptic number.

It is an amenable number.

52726640 is an abundant number, since it is smaller than the sum of its proper divisors (74095600).

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

52726640 is a wasteful number, since it uses less digits than its factorization.

52726640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22769 (or 22763 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 52726640 is about 7261.3111763648. The cubic root of 52726640 is about 374.9816642887.

The spelling of 52726640 in words is "fifty-two million, seven hundred twenty-six thousand, six hundred forty".