5781780 has 120 divisors (see below), whose sum is σ = 18783072. Its totient is φ = 1487808.

The previous prime is 5781749. The next prime is 5781791. The reversal of 5781780 is 871875.

5781780 is a `hidden beast` number, since 578 + 1 + 7 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 69619 + ... + 69701.

Almost surely, 2^5781780 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 5781780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9391536).

5781780 is an abundant number, since it is smaller than the sum of its proper divisors (13001292).

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

5781780 is a wasteful number, since it uses less digits than its factorization.

5781780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 5781780 is about 2404.5332187350. The cubic root of 5781780 is about 179.4818431729.

It can be divided in two parts, 5781 and 780, that added together give a 8-th power (6561 = 3⁸).

The spelling of 5781780 in words is "five million, seven hundred eighty-one thousand, seven hundred eighty".