55270428 has 12 divisors (see below), whose sum is σ = 128964360. Its totient is φ = 18423472.

The previous prime is 55270393. The next prime is 55270429. The reversal of 55270428 is 82407255.

55270428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55270428² = 6109640422606368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55270429) by changing a digit.

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, 2302923 + ... + 2302946.

It is an arithmetic number, because the mean of its divisors is an integer number (10747030).

Almost surely, 2^55270428 is an apocalyptic number.

It is an amenable number.

55270428 is an abundant number, since it is smaller than the sum of its proper divisors (73693932).

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

55270428 is a wasteful number, since it uses less digits than its factorization.

55270428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605876 (or 4605874 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 55270428 is about 7434.4083826489. The cubic root of 55270428 is about 380.9175150898.

The spelling of 55270428 in words is "fifty-five million, two hundred seventy thousand, four hundred twenty-eight".