55478727 has 12 divisors (see below), whose sum is σ = 84353880. Its totient is φ = 35039088.

The previous prime is 55478719. The next prime is 55478743. The reversal of 55478727 is 72787455.

55478727 is a `hidden beast` number, since 5 + 547 + 87 + 27 = 666.

It is not a de Polignac number, because 55478727 - 2³ = 55478719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55478767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162048 + ... + 162389.

It is an arithmetic number, because the mean of its divisors is an integer number (7029490).

Almost surely, 2^55478727 is an apocalyptic number.

55478727 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55478727 is a deficient number, since it is larger than the sum of its proper divisors (28875153).

55478727 is a wasteful number, since it uses less digits than its factorization.

55478727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324462 (or 324459 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The square root of 55478727 is about 7448.4043257600. The cubic root of 55478727 is about 381.3954395567.

The spelling of 55478727 in words is "fifty-five million, four hundred seventy-eight thousand, seven hundred twenty-seven".