4065780 has 24 divisors (see below), whose sum is σ = 11384352. Its totient is φ = 1084192.

The previous prime is 4065773. The next prime is 4065781. The reversal of 4065780 is 875604.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065781) 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, 33822 + ... + 33941.

It is an arithmetic number, because the mean of its divisors is an integer number (474348).

Almost surely, 2^4065780 is an apocalyptic number.

It is an amenable number.

4065780 is an abundant number, since it is smaller than the sum of its proper divisors (7318572).

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

4065780 is a wasteful number, since it uses less digits than its factorization.

4065780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67775 (or 67773 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 4065780 is about 2016.3779407641. The cubic root of 4065780 is about 159.6055387177.

The spelling of 4065780 in words is "four million, sixty-five thousand, seven hundred eighty".