55978158 has 8 divisors (see below), whose sum is σ = 111956328. Its totient is φ = 18659384.

The previous prime is 55978061. The next prime is 55978163. The reversal of 55978158 is 85187955.

55978158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

55978158 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 4664841 + ... + 4664852.

It is an arithmetic number, because the mean of its divisors is an integer number (13994541).

Almost surely, 2^55978158 is an apocalyptic number.

55978158 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55978158 is a wasteful number, since it uses less digits than its factorization.

55978158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9329698.

The product of its digits is 504000, while the sum is 48.

The square root of 55978158 is about 7481.8552512061. The cubic root of 55978158 is about 382.5364893208.

The spelling of 55978158 in words is "fifty-five million, nine hundred seventy-eight thousand, one hundred fifty-eight".