56810989 has 8 divisors (see below), whose sum is σ = 59859072. Its totient is φ = 53811120.

The previous prime is 56810981. The next prime is 56811011. The reversal of 56810989 is 98901865.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56810989 - 2³ = 56810981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56810981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9622 + ... + 14359.

It is an arithmetic number, because the mean of its divisors is an integer number (7482384).

Almost surely, 2^56810989 is an apocalyptic number.

It is an amenable number.

56810989 is a deficient number, since it is larger than the sum of its proper divisors (3048083).

56810989 is a wasteful number, since it uses less digits than its factorization.

56810989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24107.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 56810989 is about 7537.3064817612. The cubic root of 56810989 is about 384.4242566616.

The spelling of 56810989 in words is "fifty-six million, eight hundred ten thousand, nine hundred eighty-nine".