55478870 has 8 divisors (see below), whose sum is σ = 99861984. Its totient is φ = 22191544.

The previous prime is 55478869. The next prime is 55478887. The reversal of 55478870 is 7887455.

55478870 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.

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, 2773934 + ... + 2773953.

It is an arithmetic number, because the mean of its divisors is an integer number (12482748).

Almost surely, 2^55478870 is an apocalyptic number.

55478870 is a deficient number, since it is larger than the sum of its proper divisors (44383114).

55478870 is a wasteful number, since it uses less digits than its factorization.

55478870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547894.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 55478870 is about 7448.4139251253. The cubic root of 55478870 is about 381.3957672469.

The spelling of 55478870 in words is "fifty-five million, four hundred seventy-eight thousand, eight hundred seventy".