4085780 has 48 divisors (see below), whose sum is σ = 9280656. Its totient is φ = 1505280.

The previous prime is 4085777. The next prime is 4085791. The reversal of 4085780 is 875804.

It can be written as a sum of positive squares in 8 ways, for example, as 37636 + 4048144 = 194^2 + 2012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20642 + ... + 20838.

It is an arithmetic number, because the mean of its divisors is an integer number (193347).

Almost surely, 2^4085780 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 4085780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4640328).

4085780 is an abundant number, since it is smaller than the sum of its proper divisors (5194876).

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

4085780 is a wasteful number, since it uses less digits than its factorization.

4085780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 4085780 is about 2021.3312445020. The cubic root of 4085780 is about 159.8668162522.

The spelling of 4085780 in words is "four million, eighty-five thousand, seven hundred eighty".