56128005 has 32 divisors (see below), whose sum is σ = 100137600. Its totient is φ = 29828736.

The previous prime is 56127997. The next prime is 56128013. The reversal of 56128005 is 50082165.

It is an interprime number because it is at equal distance from previous prime (56127997) and next prime (56128013).

It is not a de Polignac number, because 56128005 - 2³ = 56127997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 56128005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50617 + ... + 51713.

It is an arithmetic number, because the mean of its divisors is an integer number (3129300).

Almost surely, 2^56128005 is an apocalyptic number.

It is an amenable number.

56128005 is a deficient number, since it is larger than the sum of its proper divisors (44009595).

56128005 is a wasteful number, since it uses less digits than its factorization.

56128005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 56128005 is about 7491.8625854990. The cubic root of 56128005 is about 382.8775203898.

The spelling of 56128005 in words is "fifty-six million, one hundred twenty-eight thousand, five".