56717680 has 40 divisors (see below), whose sum is σ = 132246000. Its totient is φ = 22622208.

The previous prime is 56717669. The next prime is 56717681. The reversal of 56717680 is 8671765.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56717681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35131 + ... + 36709.

It is an arithmetic number, because the mean of its divisors is an integer number (3306150).

Almost surely, 2^56717680 is an apocalyptic number.

It is an amenable number.

56717680 is an abundant number, since it is smaller than the sum of its proper divisors (75528320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56717680 is a wasteful number, since it uses less digits than its factorization.

56717680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 56717680 is about 7531.1141274051. The cubic root of 56717680 is about 384.2136759280.

The spelling of 56717680 in words is "fifty-six million, seven hundred seventeen thousand, six hundred eighty".