55978356 has 48 divisors (see below), whose sum is σ = 149700096. Its totient is φ = 15948384.

The previous prime is 55978333. The next prime is 55978361. The reversal of 55978356 is 65387955.

55978356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 38515 + ... + 39941.

It is an arithmetic number, because the mean of its divisors is an integer number (3118752).

Almost surely, 2^55978356 is an apocalyptic number.

It is an amenable number.

55978356 is an abundant number, since it is smaller than the sum of its proper divisors (93721740).

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

55978356 is a wasteful number, since it uses less digits than its factorization.

55978356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1906 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 48.

The square root of 55978356 is about 7481.8684832066. The cubic root of 55978356 is about 382.5369403428.

The spelling of 55978356 in words is "fifty-five million, nine hundred seventy-eight thousand, three hundred fifty-six".