55693780 has 12 divisors (see below), whose sum is σ = 116956980. Its totient is φ = 22277504.

The previous prime is 55693753. The next prime is 55693789. The reversal of 55693780 is 8739655.

55693780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12292036 + 43401744 = 3506^2 + 6588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55693789) 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, 1392325 + ... + 1392364.

It is an arithmetic number, because the mean of its divisors is an integer number (9746415).

Almost surely, 2^55693780 is an apocalyptic number.

It is an amenable number.

55693780 is an abundant number, since it is smaller than the sum of its proper divisors (61263200).

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

55693780 is a wasteful number, since it uses less digits than its factorization.

55693780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784698 (or 2784696 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 55693780 is about 7462.8265422694. The cubic root of 55693780 is about 381.8876070762.

The spelling of 55693780 in words is "fifty-five million, six hundred ninety-three thousand, seven hundred eighty".