55978186 has 8 divisors (see below), whose sum is σ = 91600704. Its totient is φ = 25444620.

The previous prime is 55978163. The next prime is 55978189. The reversal of 55978186 is 68187955.

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

It is not an unprimeable number, because it can be changed into a prime (55978189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272210 + ... + 1272253.

It is an arithmetic number, because the mean of its divisors is an integer number (11450088).

Almost surely, 2^55978186 is an apocalyptic number.

55978186 is a deficient number, since it is larger than the sum of its proper divisors (35622518).

55978186 is a wasteful number, since it uses less digits than its factorization.

55978186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544476.

The product of its digits is 604800, while the sum is 49.

The square root of 55978186 is about 7481.8571223995. The cubic root of 55978186 is about 382.5365531018.

The spelling of 55978186 in words is "fifty-five million, nine hundred seventy-eight thousand, one hundred eighty-six".