5691780 has 72 divisors (see below), whose sum is σ = 17489472. Its totient is φ = 1498176.

The previous prime is 5691761. The next prime is 5691793. The reversal of 5691780 is 871965.

5691780 is a `hidden beast` number, since 569 + 17 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 18387 + ... + 18693.

Almost surely, 2^5691780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5691780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8744736).

5691780 is an abundant number, since it is smaller than the sum of its proper divisors (11797692).

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

5691780 is a wasteful number, since it uses less digits than its factorization.

5691780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 5691780 is about 2385.7451666094. The cubic root of 5691780 is about 178.5456889376.

The spelling of 5691780 in words is "five million, six hundred ninety-one thousand, seven hundred eighty".