55278028 has 12 divisors (see below), whose sum is σ = 104177920. Its totient is φ = 25512912.

The previous prime is 55278023. The next prime is 55278029. The reversal of 55278028 is 82087255.

It is not an unprimeable number, because it can be changed into a prime (55278023) 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, 531468 + ... + 531571.

Almost surely, 2^55278028 is an apocalyptic number.

It is an amenable number.

55278028 is a deficient number, since it is larger than the sum of its proper divisors (48899892).

55278028 is a wasteful number, since it uses less digits than its factorization.

55278028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063056 (or 1063054 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 55278028 is about 7434.9195019180. The cubic root of 55278028 is about 380.9349737354.

The spelling of 55278028 in words is "fifty-five million, two hundred seventy-eight thousand, twenty-eight".