56281428 has 36 divisors (see below), whose sum is σ = 162591520. Its totient is φ = 16080336.

The previous prime is 56281411. The next prime is 56281429. The reversal of 56281428 is 82418265.

56281428 is a `hidden beast` number, since 5 + 628 + 1 + 4 + 28 = 666.

56281428 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 (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56281392 and 56281401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56281429) 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 11 ways as a sum of consecutive naturals, for example, 111418 + ... + 111921.

Almost surely, 2^56281428 is an apocalyptic number.

It is an amenable number.

56281428 is an abundant number, since it is smaller than the sum of its proper divisors (106310092).

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

56281428 is a wasteful number, since it uses less digits than its factorization.

56281428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223356 (or 223351 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 56281428 is about 7502.0949074242. The cubic root of 56281428 is about 383.2260616454.

It can be divided in two parts, 5628 and 1428, that added together give a square (7056 = 84²).

The spelling of 56281428 in words is "fifty-six million, two hundred eighty-one thousand, four hundred twenty-eight".