56128550 has 12 divisors (see below), whose sum is σ = 104399196. Its totient is φ = 22451400.

The previous prime is 56128517. The next prime is 56128559. The reversal of 56128550 is 5582165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56128559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561236 + ... + 561335.

It is an arithmetic number, because the mean of its divisors is an integer number (8699933).

Almost surely, 2^56128550 is an apocalyptic number.

56128550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56128550 is a deficient number, since it is larger than the sum of its proper divisors (48270646).

56128550 is a wasteful number, since it uses less digits than its factorization.

56128550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122583 (or 1122578 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 56128550 is about 7491.8989582081. The cubic root of 56128550 is about 382.8787596261.

The spelling of 56128550 in words is "fifty-six million, one hundred twenty-eight thousand, five hundred fifty".