56120866 has 4 divisors (see below), whose sum is σ = 84181302. Its totient is φ = 28060432.

The previous prime is 56120861. The next prime is 56120873. The reversal of 56120866 is 66802165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66802165 = 5 ⋅13360433.

It can be written as a sum of positive squares in only one way, i.e., 47210641 + 8910225 = 6871^2 + 2985^2 .

It is not an unprimeable number, because it can be changed into a prime (56120861) by changing a digit.

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 as a sum of consecutive naturals, namely, 14030215 + ... + 14030218.

Almost surely, 2^56120866 is an apocalyptic number.

56120866 is a deficient number, since it is larger than the sum of its proper divisors (28060436).

56120866 is a wasteful number, since it uses less digits than its factorization.

56120866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28060435.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 56120866 is about 7491.3861200715. The cubic root of 56120866 is about 382.8612867912.

The spelling of 56120866 in words is "fifty-six million, one hundred twenty thousand, eight hundred sixty-six".