55726840 has 64 divisors (see below), whose sum is σ = 139426560. Its totient is φ = 19906560.

The previous prime is 55726789. The next prime is 55726841. The reversal of 55726840 is 4862755.

It is a happy number.

55726840 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 55726840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55726841) 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 15 ways as a sum of consecutive naturals, for example, 14392 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^55726840 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 55726840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69713280).

55726840 is an abundant number, since it is smaller than the sum of its proper divisors (83699720).

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

55726840 is a wasteful number, since it uses less digits than its factorization.

55726840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 55726840 is about 7465.0411921168. The cubic root of 55726840 is about 381.9631553510.

The spelling of 55726840 in words is "fifty-five million, seven hundred twenty-six thousand, eight hundred forty".