56756869 has 4 divisors (see below), whose sum is σ = 61122796.
Its totient is φ = 52390944.
The previous prime is 56756867. The next prime is 56756891. The reversal of 56756869 is 96865765.
It can be divided in two parts, 5675 and 6869, that added together give a square (12544 = 1122).
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 33350625 + 23406244 = 5775^2 + 4838^2
It is a cyclic number.
It is not a de Polignac number, because 56756869 - 21 = 56756867 is a prime.
It is a super-2 number, since 2×567568692 = 6442684357366322, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (56756867) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182944 + ... + 2182969.
It is an arithmetic number, because the mean of its divisors is an integer number (15280699).
Almost surely, 256756869 is an apocalyptic number.
It is an amenable number.
56756869 is a deficient number, since it is larger than the sum of its proper divisors (4365927).
56756869 is a wasteful number, since it uses less digits than its factorization.
56756869 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4365926.
The product of its digits is 2721600, while the sum is 52.
The square root of 56756869 is about 7533.7154844074.
The cubic root of 56756869 is about 384.3021461852.
The spelling of 56756869 in words is "fifty-six million, seven hundred fifty-six thousand, eight hundred sixty-nine".